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- "No one can make it alone now. I just didn't want anyone to die."
- —Andrea justifying her actions to Rick.[src]
Andrea is a main character and survivor of the outbreak in AMC's The Walking Dead. She and her sister, Amy, were saved by Dale Horvath during the initial outbreak and eventually joined a group of survivors at a camp outside Atlanta. She gains strength in being talented with firearms at the Greene family farm. After it is overrun, Andrea meets Michonne and is taken to Woodbury eight months later. At Woodbury, Andrea becomes involved in the town's affairs, stepping up when leadership was lacking and later engaged in a relationship with Philip Blake, better known as The Governor until his true motivations are exposed. She finds herself caught in the crossfire between her previous group and the town of Woodbury, opting for a peaceful resolution between the two conflicting sides.
Andrea is intelligent, cautious, and brave. She was extremely protective of her younger sister before her death. Never one to shy away from a challenge or a fight, Andrea is stubborn, opinionated and first and foremost interested in keeping herself and those she cares about most out of harms way. Her closeness to Amy is what directly influences her into becoming suicidal around the end of season one and possibly her reason to punish Dale Horvath, as she blames him for not letting her die in the way she wanted do and continuing having her to survive in the cruel post-apocalyptic world.
During season two, she begins to become more independent, even considering leaving the group, and wanting to keep the gun her father gave her, despite Dale's disapproval due to her lack of gun knowledge and brief suicidal streak. However, after adequate training with Shane Walsh, she becomes quite efficient with firearms and became a strong protector for the group and is more than willing to protect the group from any danger. It is shown that Andrea looks up to Shane as a better leader for the group than Rick and follows him on many crucial decisions such as abandoning the search for Sophia and killing the walkers in Hershel's barn. By season three, she had been separated from the group after the farm was overrun, and was saved by Michonne, with whom she forms a close bond.
After being brought to Woodbury, she begins a relationship with the Governor, which eventually ends when Andrea realizes that the Governor has a dark, sadistic nature. During the second half of the third season it is shown that Andrea possesses strong leadership abilities as shown by a speech delivered to the Woodbury people following an attack by Rick and his group and does not see a war between the two groups as necessary. Andrea was shown to have become very bold as shown by her attempt to kill the Governor in order to protect her former group from certain death by the man but unfortunately failed, leading to her tragic demise.
Andrea was born twelve years ahead of her sister. Because of their different personalities, their parents gave them different upbringings. During this time she was in college to study law, she remained distant from her family, frequently missing Amy's birthday parties. After getting a degree, she eventually became a successful civil rights attorney. Before Andrea and Amy went on a road trip, their father gave Andrea a gun for protection. She has remained protective over the gun ever since.
As they were heading back to Amy's college after the trip, they were caught in the initial stages of the outbreak. They were stranded in Atlanta when they were rescued by Dale Horvath, and soon met up with a band of other survivors.
When Glenn Rhee and Rick Grimes enter the department store, Andrea greets Rick with a handgun, angry at his recklessness, which has riled up the zombies who now surround the building. She calms down and puts away her gun. Later, she and Rick speak about her sister, Amy back at the camp. She points out a necklace in the shape of a mermaid that her sister would like and Rick asks why doesn't she take it. She replies that it would be looting and he's a cop, but he dismisses the fact, saying "Looting probably doesn't apply in this situation"; she smiles and pockets the necklace. Later, when Glenn and Rick attempt to grab some cars to escape, she goes up to the roof with Morales and Jacqui and she starts breaking down when she sees Rick drive away with the rescue truck, thinking he is abandoning them. But Rick does come back, and Andrea and the others make it to the truck just as the zombies break into the department store.
Andrea and Amy reunite once she returns to the camp. When Carl Grimes and Sophia Peletier find a zombie, they scream, prompting the adults to rush to them and killing it. Andrea and Amy watch in disgust as the zombie's head is separated from its body. Later, she is doing laundry with her sister, Jacqui and Carol Peletier. As the women share what they miss most, she admits she misses her vibrator, prompting the women to break out in laughter. Ed Peletier walks over to the women in curiosity and tells the women they should be working and not laughing. Sick of Ed's attitude, she begins to stand up for herself and the others, tossing him his laundry saying that if he doesn't like it, he can do it. Ed throws the laundry back at her and responds that he won't smack her just because she's "some college educated coos". With heated tensions, Carol and Amy try to separate the two, which results Carol in being slapped and Shane Walsh attacking Ed in a fit of rage.
The next day, Andrea is fishing with Amy, recollecting memories they had with their father while fishing, and how he raised them differently because he knew they would be special and different. Later, she returns to camp with a bunch of fish and they all have a nice dinner at night. Dale asks Andrea to back him up on the watch thing, but she disagrees. Prior to the dinner, she is in Dale's RV looking for wrapping paper to wrap the mermaid necklace for Amy, since it is her birthday soon. Unfortunately, zombies attack the camp, killing several people, including Amy, which leaves Andrea very, very distraught as Amy dies in Andrea's arms.
A deeply disturbed Andrea hovers over her sister's body for countless hours, waiting anxiously for her to turn into one of the undead and hardly ever keeping her eyes off her. She pays little attention to most of the people around, refusing to be distracted. She even resorts to pointing a gun at Rick when he comes near her and tries to get her focus off of Amy. Dale at the end of the day tries to comfort her by telling about his wife's death, to which she opens up shortly afterward. Andrea witnesses Amy's transformation finally, and after a moment of holding her, shoots her in the side of the head.
Along with the rest of the survivors, they find themselves in the CDC. She is in a deep state of depression since Amy's death, and tells Dale that, despite the idea that they can start a new life, there's nothing left for her to live for. When the building's energy resources begin to run low, a countdown is initiated. Dr. Edwin Jenner, the sole doctor to remain at the building, explains it as the process of "decontamination", and that the building is sealed shut and there is no way out. Andrea, devastated by the fact that she has lost everything, decides to remain in the building even when Dr. Jenner unlocks the door of the basement to allow the other survivors a chance to escape. Jacqui, Dr. Jenner, and Andrea have decided on their fates, until when Dale remains to convince Andrea not to. Both Dale and Andrea decide to stay momentarily, until the dying seconds. Just before the C.D.C. building explodes as the process of decontamination, both Dale and Andrea escape the building and find cover behind sandbags. Surviving the self-destruction of the C.D.C. building, they reunite with the other survivors and drive off.
Following their escape from the CDC, Andrea begins punishing Dale for guilting her into leaving the CDC, effectively robbing her of making her own choice. Stopped on the highway, Andrea is caught off-guard when a herd approaches, and is forced to seek refuge in the RV bathroom as a walker shuffles into the RV Andrea tries to re-assemble her pistol in haste, causing enough noise to alert the walker. Dale's quick thinking gives Andrea the means to defend herself, and she plunges a screwdriver through her assailant's head as it lunges at her.
Andrea wanted to use the pistol to dispatch the walker instead of a silent weapon, and a gunshot would have alerted the rest of the herd. Dale, Rick, and Shane believe it is in the best interest of the group to only allow those who have been properly trained to use firearms. This makes Andrea even angrier with Dale. In searching for Sophia, the group is drawn to a church. There, Andrea overhears Shane and Lori's discussion and Shane agrees to leave when the chance comes. After, Andrea confronts Shane and asks to go with him.
The survivors continue searching for Sophia. Andrea is attacked by a walker, but she is saved by Maggie on horseback. Back at the RV, there is still tension between her and Dale, even as he asks for her forgiveness for some of the decisions he has made on her behalf. He reluctantly returns her father's pistol to Andrea, but asks that she doesn't make him regret it.
Dale, Carol, Daryl Dixon, and Andrea spend the night on the highway in the RV, though Carol's sobbing keeps everyone awake. Andrea decides to join Daryl in a midnight search for Sophia. During their walk in the woods they discuss Sophia's chances, and come across a suicide victim by hanging. Though the suicide worked, it didn't prevent reanimation and the man now hangs helplessly in the tree as a walker. Daryl asks Andrea if she wishes to continue on living. She bargains with Daryl that she will answer his question if he puts the suspended walker out of its misery. Her response to Daryl's question is "I don’t know if I want to live... or if I have to, or if it’s just a habit."
Andrea and the other survivors who remained on the highway arrive the next morning at the farm of Hershel Greene, where Carl was taken after being shot. Though Andrea plays a minor role in this episode, she is part of the most notable scene with the survivors attempting to retrieve the 'swimmer' from the bottom of one of the five wells on Hershel's property. As Glenn is lowered into the well to lasso the water-logged walker, the pump breaks. As Andrea and the other survivors struggle to re-stabilize the rope, Glenn dangles precariously within the walker's grasp. Once this near-tragedy is averted, Andrea, along with the other survivors, attempt to hoist the walker out of the well before killing it to avoid contaminating the well. However, the walker's body is too badly deteriorated and strained by the weight of the extra water it has absorbed to withstand the stress of being pulled from the well. Its body is ripped in half as it crosses the threshold, and the bottom half falls back into the well. Andrea and the other survivors are disgusted, moreover frustrated that the well is now contaminated despite their best efforts.
Andrea begins to transition from a depressed and unstable personality into a stronger and more dependable survivor, showing a desire to help the group and concern for others when she takes leadership of one of the sub-groups that leaves the farm to search for Sophia, and later elects to take watch on top of the RV. She has increased her gun-wielding prowess and believes that she is now able to dispatch threats from a distance with proficiency. She is excited upon spotting a lone walker approach the farm, as it presents an opportunity for her to prove herself to the others. Though Rick and the other survivors advise her not to shoot, Andrea fires on the walker from atop the RV but learns afterward that it was actually Daryl, limping back from his difficult ordeal in the woods. Luckily for Daryl, her aim is not quite spot-on just yet, as the bullet only grazes his head. Though Andrea is mortified that she almost killed Daryl, it may prove to be only a minor setback to her growing confidence.
Andrea apologizes to Daryl for shooting him and he forgives her. A short time later, Andrea continues to sharpen her shooting skills under Shane's tutelage, but has difficulty hitting a moving target. Adding yet another layer of difficulty, Shane distracts and agitates Andrea, trying to simulate a live environment. He eventually goes too far when he brings up Amy but two reconcile when Shane asks her to go with him on a dangerous mission to check out a lead on Sophia. Andrea follows Shane into a house to discover charred and rotting corpses and no signs of Sophia. A group of walkers are alerted to their presence, and the two are forced to bolt for the exit. More walkers have collected in the street and are blocking their escape. Shane clears out the walkers around their car, and assigns Andrea to cover the street. She can't seem to shoot any of her targets in the head, and walkers continue to advance on her. Shane picks off the nearest one and then lowers his weapon indicating that it's sink or swim time. As a walker gets almost within arm's length, She blasts a hole in its head before it touches her, and she becomes much more precise, nailing all head shots thereafter. Andrea walks towards the car but stops to take aim at the next wave of walkers closing in and the scene ends, but it is assumed that she dispatches them flawlessly. On the way back, Andrea grabs Shane's crotch. Shane stops the car and says "Come on then" and the two have sex.
After the discussion regarding the walkers in the barn, Andrea prepares herself in the RV to guard the barn as Shane requested. Dale tries to warn Andrea about Shane, but Andrea supports Shane's sentiments, adding "He's not a victim." After Andrea leaves, Dale makes an attempt to hide the group's firearms, fearing Shane's pending aggressive reaction to the news of the barn walkers. Rick, Hershel, and Jimmy return with two fresh walkers who had been trapped in the swamp. Before they can load them into the barn with the others, Shane goes over the edge, declaring that he's had 'enough.' After killing the walker that Hershel was escorting, Shane proceeds to break open the barn doors, releasing the horror within. Andrea quickly takes a spot next to Shane, forming a firing line to repel the walker onslaught. Andrea, Shane, Glenn, T-Dog, and Daryl gun down the walkers as they emerge, until zombified Sophia appears, stunning all except for Rick, who steps up to dispatch her.
Emotions run high in the aftermath of the barn walker massacre. Beth Greene goes over to her mother Annette to mourn, but Annette is not dead and attacks Beth. Andrea drives a scythe through the zombified Annette's head to end the struggle. After the funeral, Andrea and T-Dog pile corpses into Otis's truck, saying that Shane did what needed to be done. Dale protests, suggesting that a new problem with Hershel was created in the wake of resolving the safety concern of the barn walkers. Andrea, T-Dog, and Shane all burn the barn walkers behind the barn.
At the farmhouse, everyone is preparing for dinner when Shane realizes Lori is missing. Andrea says that Lori had asked her to watch Carl, and they conclude that she had left in search of Rick and Hershel. Shane goes after Lori. After retrieving her, Shane talks to Lori about their affair and that his feelings remain strong, but doesn't mention the sexual encounter with Andrea. The next morning, Shane, Andrea and Daryl are preparing to go after Rick when Hershel's car approaches and Rick's crew piles out. Andrea asks what they should do with Randall, a survivor whom Rick, Hershel, and Glenn rescued the night before. Rick discusses releasing him away from the farm when he heals. Shane sees Randall is a threat and wants to kill him outright. Outside, Andrea tells Shane she agrees with him about Randall and about several other things, but says that his presentation leaves something to be desired. Shane says that he regrets not leaving with her when they had the chance.
Andrea is first shown on top of Dale's RV, keeping watch. Lori asks if she has seen Hershel or Maggie anywhere, and told her to get them immediately. Maggie scolds Beth for thinking about suicide as Lori and Andrea listen from nearby. Andrea mentions that Lori shouldn't have taken the knife away from Beth, and that Beth needs to make her own choice. Lori is shocked by the notion, commenting on Andrea's own suicidal situation, showing that she resents Andrea for not helping with the chores. Andrea says that she helps keep the camp safe, which is more important than laundry, and also resents Lori for having been so lucky to retain her family through the apocalypse, noting that suicide is a viable option for others who have not been so fortunate. Andrea leaves the conversation with Lori and offers to relieve Maggie on keeping an eye on Beth. Andrea advises Beth on how to deal with the pain, but also leaves the door open for her to make her own decision, believing that she will come around and not attempt to kill herself. Unguarded, Beth locks herself in the bathroom and attempts suicide with shards from the smashed mirror. Andrea runs to the farmhouse after Beth's attempted suicide. Lori reports that Beth didn't cut herself deeply. Andrea is happy to hear the news, but Maggie believes that Andrea's gamble was reckless, and tells her off.
Dale asks Andrea to guard Randall so that his efforts to change the minds of the camp are not found to be in vain, and if she thinks Randall should be executed, arguing that despite the state of the world, keeping their humanity is a choice. Andrea reluctantly agrees to keep watch on Randall. Shane approaches the shed and asks Andrea if she would stop him if he were to try to shoot Randall. She says that she would, remarking that she had a great teacher. Shane shares his suspicion that Rick won't be able to go through with the execution. Later, the group gathers in the house. Rick asks for everyone to share opinions. Dale believes that they should give Randall a chance to prove himself, but everyone disagrees and sees Randall as a much greater potential threat than asset. Dale believes that even if he doesn't deserve a chance to become a part of the camp, that he doesn't deserve to die for a crime he may never commit. Andrea is the only one who eventually comes over to Dale's side, and says that they should find another way to deal with Randall. After Carl interrupts the execution, Dale investigates a strange sound in the field and is attacked by a walker. Daryl comes to Dale's rescue, but not before he is mortally wounded. The group is horrified to discover Dale's condition, and Andrea notes that he is suffering that someone should do something. Daryl eventually puts him down.
A scene running alongside the Dale's funeral shows Shane, Daryl, Andrea, and T-Dog hunting down walkers. Hershel permits all but Shane to move into his house. Rick plans for himself and Daryl to bring Randall out to a nearby town and leave him there. Rick tells Andrea to help Hershel watch over the farm while they are gone. Andrea asks, “You want me to babysit Shane?” Rick says yes, because she is close to Shane.
Later, Andrea and Glenn are working on Dale’s RV. Glenn cries because he misses Dale, and is ashamed that he did not agree with him earlier, as Andrea did. Andrea comforts him and tells him Dale knew that Glenn did not really want Randall to be killed. They fix the RV. A thorough search of the farm shows no sign of Randall. Shane buries his gun and shouts to the group Randall escaped and is armed. Rick assembles Glenn and Daryl to go with him and Shane to track him down.
When Carl shoots Shane, the herd travelling through the woods near the Greene farm is drawn to the sound of the gunshot. Andrea contemplates heading out to look for the missing survivors when Glenn and Daryl return, reporting that Randall had reanimated. Soon the group discovers that they have a much bigger problem - a large herd approaching. Lori is in a panic, not knowing where Carl is, while the rest of the group decides to get into vehicles and try to lure the herd away from the farm. T-Dog and Andrea pair up in Otis's truck, with Andrea firing at walkers from the passenger side while T-Dog drives. Andrea along with the other survivors rack up numerous kills before concluding that there are far too many walkers to manage, and their best chance is to flee. As Andrea and T-Dog make their way back to the farmhouse, Andrea gets out of the car, telling Lori and Beth to get in. Lori then tells Andrea to go get Carol, who is cornered by two walkers.
As Andrea manages to take care of the immediate threat to Carol, a walker looms dangerously close. Carol warns Andrea just in time, but as the walker is dispatched from point-blank, the weight and momentum of the dead corpse manages to knock Andrea over and land on her, temporarily pinning her. T-Dog, Lori and Beth are watching this from the car, and a walker's arm was blocking part of the window they were looking through, not allowing them to see that Andrea had indeed killed the walker, so they assume that she is dead, and they drive off. Andrea pushes the walker off of her, noticing that T-Dog, Lori, and Beth have drove away without her, and Carol has ran off. She then tries to flag Rick down as he, Carl and Hershel are fleeing from the farm, but they don't see her. She has no alternative but to run and shoot the numerous walkers pursuing her throughout the night. After what seems to be a long, exhaustive fight for survival lasting into the early morning hours, Andrea finally runs out of ammunition and energy, and is toppled by what may have been the last nearby walker of the group that had been pursuing her from the farm. As the walker is about to bite, it's head suddenly vanishes, leaving only a bloody stump. Bewildered and exhausted, Andrea looks up at her savior: a hooded figure toting a blood-stained katana blade and two pet walkers.
It is revealed in this season that Andrea and Michonne (the hooded figure that saved Andrea's life in the Season 2 finale) have taken refuge at a game cooler, where Andrea is sick from influenza. Michonne raids a local pharmacy, bringing Andrea aspirin. Andrea unsuccessfully tries to convince Michonne to leave her, saying she can take care of herself. Andrea, however, is successful at convincing Michonne that they need to move out now instead of waiting a few days like Michonne had originally planned due to the walkers that surround their location. Andrea, Michonne, and her two pet Walkers flee out of a back entrance of the game building.
While travelling on the road, Andrea and Michonne see mysterious plumes of smoke rising in the distance. Going to investigate, they discover a crashed helicopter. Andrea stays hidden in the bushes while Michonne investigates, until the arrival of The Governor and his group. Michonne kills her pet walkers, attempting to prevent the men from detecting their presence. However, an unidentified person sneaks up on them, and a man's voice instructs them to lower their weapons and turn around. As Andrea and Michonne comply with the request, the man holding them at gunpoint is revealed to be Merle Dixon. Surprised to see Merle, Andrea passes out.
Andrea drifts in and out of consciousness while riding in a vehicle, but notices a dead corpse hanging from a tree and several abandoned vehicles before entering Woodbury. She is then taken care of by Dr. Stevens while Michonne watches. Merle comes into the room and asks about Daryl. Andrea tells him briefly what has transpired since she last saw him. The Governor arrives, but refuses to allow them to leave after dark or return the women their weapons. He also reveals that they are all infected, and that everyone will come back as walkers no matter how they die.
The Governor shows Andrea and Michonne outside and welcomes them to Woodbury, showing off his impressive fence they have built around the town, and how they protect it. The following day Andrea and Michonne learn more about Woodbury from Rowan. Andrea seems to be impressed by The Governor and his accomplishment of creating a safe town, though Michonne seems more hesitant to trust him. Andrea grows tired of Michonne's aloof nature, telling her that she knows little to nothing about her. Andrea is friendly with The Governor when he returns from his mission to find Lieutenant Welles' comrades.
Andrea is preparing to leave Woodbury with Michonne, who says they should head for the coast and perhaps find a boat. Andrea is skeptical of this plan, but knows Michonne is suspicious of The Governor.
Andrea gives a map to Merle, so that he can find Hershel's farm and search for Daryl. She talks to The Governor one last time, and he tells her his name is Philip. She returns to Michonne, reluctant to leave, and convinces her to stay in Woodbury a little longer.
Woodbury is busy preparing for a day of celebrating as part of a party put on by Philip. Andrea enjoys the day's festivities, including cold drinks and an inspiring toast by Philip. When she questions Milton Mamet about the big event for the night, he avoids telling her.
She is told later by Merle that Philip wants to talk to her, and that it is urgent. Philip informs her that Michonne has broken into a private area and slayed a group of captive Walkers, and that she threatened Philip with her sword. When Andrea asks why he was keeping Walkers captive, Philip does not give her the answer just yet.
Going back to the room she shares with Michonne, Andrea asks an agitated Michonne why she did those things. "You're freaking me out," Andrea says, watching her hurriedly pack their things. Michonne continues to go on about how suspicious Woodbury really is, and Andrea says, "You are not making any sense." However, she decides to leave with her anyway.
As the pair of them are walking towards the gate to leave, Merle spots them and prevents them from going. He speaks briefly to a guard, and when Andrea tries to talk to him, he says, "I'm going to need you to back up." Confused, she turns to Michonne and asks if they can stay a little while longer. Andrea says that Woodbury is the refuge they have been seeking for 8 months, and that they should stay. Michonne gives her an ultimatum: either come with her, or stay in Woodbury without her. When Andrea hesitates, Michonne scoffs, "You just slowed me down anyway", and leaves her.
Later, while she is sitting at a bench and feeling hurt, Philip approaches Andrea. He comforts her, saying he has something in mind that will help blow off steam. That night, Andrea and the rest of Woodbury look on as Merle and Martinez face off in an arena of Walkers. The two men kick and punch each other, surrounded by Walkers, while Philip and the rest of Woodbury cheer.
Andrea becomes angry, accusing Philip of being "sick". Philip pulls her aside and says that they have pulled out the zombies' teeth, so that the men cannot be harmed and that it is just for fun. Philip says that he is teaching the people to be brave. Andrea still appears upset by this, as Merle defeats his opponent.
Carl, still believing that Andrea is dead, mentions her when listing the names of deceased female members of the group as possible names for the newborn baby.
Andrea has been accepted as a member of Woodbury now, and wants to contribute in any way she can. She asks Philip if she can guard the wall, and he agrees.
Andrea meets Haley while guarding the wall, who reveals that she had lost her father and brother. When a walker approaches, she fails to kill it with her bow. Andrea jumps from the wall, knocking down the walker and stabbing it in the head.
Later, she is scolded by Philip, who does not want anyone leaving the wall. Andrea admits that she actually liked the arena fighting, but it bothered her to like them. Philip assures her nothing is wrong with liking a fight.
Sparks fly between the two later, and she ends up kissing him. They get more passionate later on, and she ends up having sex with him.
Andrea is invited by The Governor to witness Milton's conduction of an experiment on the ailing Michael Coleman. Andrea questions if Milton has ever seen reanimation, to which he denies and explains that he was an only child and his parents had passed away while he was young. She later witnesses Michael reanimating and Milton repeats the experiment. The walker grips onto the bed and Milton believes that it was a positive response. Andrea believes it was just a random reanimation reaction. Milton unties Michael's restraints and repeats the experiment once more. The reanimated Michael does not hesitate and pounces on him, but before he can bite him, Andrea stabs it in the head while Milton, shaken, states that he will study his work and walks off.
Andrea informs The Governor that she wants to assist Milton in cremating Mr. Coleman; he remarks that "Woodbury's starting to grow on you." She is later seen with The Governor as he assembles a group to kill Rick and the other intruders. She volunteers to help the others, but The Governor insists that she stay behind; she nonetheless takes a gun and helps the guards shoot at Rick and the others, though she can't identify them due to the smoke. She spots Oscar and fires at him, but misses her shots.
Andrea later discovers The Governor, who had been mutilated by Michonne, and draws her gun at the latter, but doesn't fire. After approaching The Governor to comfort him, Andrea notices the tanks containing the severed heads of walkers and the corpse of Penny. She demands to know why he had them there, The Governor gives her a vague answer about the heads before brushing her next question about Penny off. Andrea is later seen at the gathering of Woodbury citizens when The Governor denounces Merle a traitor and is shocked when he reveals their prisoner to be Daryl.
Andrea tries to talk Philip out of the deathmatch between Daryl and Merle, but to no avail. When the Woodbury survivors are distraught after the attack, Andrea manages to deliver a motivational speech, telling them that they have to persevere and assist in calming them down. Andrea also learns that her old group were the ones responsible for attacking Woodbury and causing the death of seven residents.
The Governor visits Andrea, requesting her to take over leadership of Woodbury, insisting that he had "screwed up." Andrea later goes searching for Martinez and The Governor, who both went missing. Milton dodges her question, suggesting that The Governor may have went on a supply run. Andrea, however, doesn't believe his claims and walks off.
Andrea talks with The Governor, who tells her that the prison group attacked them first while he was simply attempting to negotiate. He tells her that they are "bloodthirsty." He also tells her that if she goes to the prison, she is to stay there. Andrea talks with Milton, and wants him to cover for her as she sneaks out to go the prison to make peace between Woodbury and the prison group. Milton and Andrea capture a walker in the woods to use as a deterrent. Andrea hacks both of the walker's arms off and then uses a rock to curb-stomp the walker's teeth out to prevent it from biting. Andrea and Milton are saved by Tyreese Williams's group when another walker appears. Andrea arrives at the prison, learning of the fates of Shane, Lori, and T-Dog. Andrea tries to make peace, but Rick and the others make it clear that they want to retaliate against Woodbury and The Governor. Andrea learns that The Governor lied about who shot first from Rick, and Andrea's negotiation ends when Rick storms off after Andrea refuses to get them inside of Woodbury. Andrea accuses Michonne of poisoning the group, but Michonne argues that she was telling them the truth. While talking with Carol, Carol tells her to sleep with The Governor and give him the best night of his life, and then to kill him while his guard is down. Before departing, the group gives her a car and Rick hands her a handgun and a knife. She arrives back to Woodbury and sleeps with The Governor. While he is asleep, she stands over his bedside with a knife, contemplating Carol's plan. Andrea, however, puts the knife away and peers out of the window, unable to go through with the killing.
Andrea, along with Milton and Martinez arrive at an abandoned farm's barn as set by her, in order to get Rick and Philip to talk about the situation between the two groups. Andrea then, noticing the meeting began without her, strides inside the barn and try to mediate the situation but is told by Rick he knows about the raids, the heads and about Maggie.
Later, she tells the both of them to calm down after Philip demands Rick's surrender, and is then kicked out by The Governor. While waiting outside the barn, a small group of walkers approaches Andrea, Daryl, Hershel, Milton and Martinez, which causes Andrea, Daryl and Martinez to go kill them.
Andrea asks Hershel what Philip did to Maggie, which he answers saying "He's a sick man". Andrea despairs and says she can't go back to Woodbury. Hershel agrees that she belongs at the prison, but warns her that once she leaves, she can't go back.
When Rick and Philip are done talking, all of them enter in their cars, causing Andrea to join Woodbury again. When they get there, Philip thanks her for setting up the meeting, but doesn't tell her about his plan of killing Michonne and the rest of the group. Andrea says she is glad she could help.
Milton tells Andrea about how he saw the torture room that Philip made for Michonne. He takes her to see it, and they look at all the tools that Philip plans to use. Milton tells her to go to the prison and tell them that they have to leave. She instead says that she must kill Philip. He walks in, and Andrea, in an overlooking room, points her gun through the shutters on the window. Milton forces her to put it down. Later, Martinez tells her to give him her gun, for "precautions". Andrea is later seen climbing over a wall that Tyreese and Sasha are guarding. Tyreese tries to stop her, only to have Andrea pull a knife on him. After a little negotiation, they allow her to leave. She starts a steady run, knowing that Philip will soon find out. She is running down an unknown road when she hears a car. She runs into the near woods and hides behind a tree. She is grabbed from behind by a walker, and two more approach her. She blocks them with her leg, and then kills them. She is next seen in an empty field when she hears the car again. She ducks down, but it's too late. Philip starts following her as she runs away. She goes through some debris, and Philip has to go around. She winds up at an abandoned warehouse. While inside, she accidentally tips over a bucket of tools, alerting Philip. She ends up finding a door. She opens it, finding many walkers on the stairwell inside. She closes the door, and turns around, seeing that she is cornered by Philip. She opens the door again and hides behind it, allowing the walkers to attack him. She finds a way out and leaves. She later arrives at the prison, trying to signal Rick, who is on guard in a watchtower. She is then grabbed and pulled down by Philip. Rick sees this out of the corner of his eye, and aims his rifle down there, only to come up empty. Philip somehow makes his way back. She is then seen, chained to a chair in the torture room.
Andrea is seen still restrained to The Governor's torture chair. After Milton is beaten by The Governor, he is ordered to kill Andrea. When he refuses he is stabbed by The Governor and left to die but not before Milton leaves some pliers behind the chair. He tells Andrea about the pliers and orders her to stab him in the head once she frees herself. She tries to kick the pliers so she can grab them but she cannot in her boots. She takes off her boots to get the pliers more quickly as Milton slowly dies. After some struggle, she gets them and begins to free herself. As she begins to cut through her restraints, Milton reanimates. She manages to get one arm free as the now undead Milton stands up, ready to attack. She tries desperately to get the other arm free but is too late, for as she stands up, Milton bites her. She quickly dispatches Milton before falling to the floor. Later, Rick, Michonne, Daryl, Tyreese, and Sasha arrive at the torture room and find a pool of blood outside the door. They go in, find Milton's body, and find a bitten Andrea sitting against the wall. Michonne cries as she sees that Andrea has been bitten. Andrea requests that she commit suicide to avoid reanimation. Rick gives her his revolver and goes outside with Daryl. Michonne stays with her friend as she commits suicide, preventing reanimation and ending her life. Her body is later brought back to the prison for burial.
- The Governor (Caused)
The Governor stabs Milton in the stomach, intending to have the zombified Milton eat a bound Andrea alive.
- Milton Mamet (Infected, Caused, Off-Screen)
On the verge of death, Milton tells Andrea that he left some pliers behind her. He urges her to hurry with getting off her handcuffs, and to stab him in the head if she escapes. Clipping her handcuffs, Andrea notices that he has turned and is about to attack her. She barely gets them off before he bites her neck, and is stabbed.
- Herself (Suicide, To Prevent Reanimation, Off-Screen)
After being bitten on the neck by a zombified Milton, she is found by Rick, Daryl, Michonne, and Tyreese in the room where Glenn and Maggie were being held. Andrea urges the group to allow her to kill herself, and Rick hands her his gun as a tearful Michonne stays behind with Andrea one last time.
This list shows the victims Andrea has killed:
- Amy (Zombified)
- Shawn Greene (Zombified) (Alongside her fellow survivors)
- Arnold Greene (Zombified) (Alongside her fellow survivors)
- Duncan (Zombified) (Alongside her fellow survivors)
- Lacey (Zombified) (Alongside her fellow survivors)
- Mr. Fischer (Zombified) (Alongside her fellow survivors)
- Mrs. Fischer (Zombified) (Alongside her fellow survivors)
- Greene farm inhabitants (Zombified) (Alongside her fellow survivors)
- Annette Greene (Zombified)
- Michael Coleman (Zombified)
- Milton Mamet (Zombified)
- Herself (Suicide, To Prevent Reanimation)
- Numerous counts of zombies
- Andrea is the first main character to be killed in a season finale.
- Andrea has had a sexual relationship with the main antagonist in both Season 2 and 3 (Shane Walsh and The Governor). Coincidentally, she initiated a sexual relationship with the main antagonists in the sixth episodes of the two seasons: "Secrets" and "Hounded".
- In The Walking Dead: Survival Instinct, there is a man named Terry Harrison who mentions that he is searching for his two daughters, Amy and Andrea. While unconfirmed, this appears to be an Easter egg, a nod to the Amy and Andrea in the TV series.
- It was said by Laurie Holden that Andrea wasn't originally supposed to die in season 3, saying that Andrea was supposed to end up as the leader of Woodbury's people, but it was changed three weeks before the shooting of the episode began. "...Everyone was shocked," Holden says in one of her interviews, "but this is The Walking Dead. Nothing is certain anymore.", and it was Mazarra's decision that no one supported. She said in one of her interviews that it was Mazarra's decision to kill her off for "shock value". She said, "There was somebody in charge for Season 3, who thought that it was 'cool'... to kill Andrea, because he wanted the world to go "Whatttt!?" You know? So it was for shock. It wasn't a plan, it wasn't supposed to happen. I found out the day before, and it could've been anybody. He just wanted to kill somebody big--umm... you know, for shock. But he never read the comic book, really. So, he did not realize what he was doing, and we had to shoot it. I mean--because... you know, when you're working on a film, you have to do it, so. It was very sad, because Andrea was supposed to be there for the very end. So, it was sad for me. It was sad for my The Walking Dead family. The man lost his job because of that decision. But it was never supposed to happen, and you know Andrea was supposed to end up with Rick. So, this was one man's decision, who changed... history. You know? But it wasn't something that anybody supported. Not any writers, no--you know? It wasn't supposed to happen."
- Something similar happened to her actual death scene. The one that was aired was re-written by Scott Gimple, while the original (which was written by Glen Mazzara) showed Andrea was bitten by Milton on the hand while still bound to the chair, screaming. In the end, Tyreese and Sasha were the ones who found her, and then the two freed Andrea from the chair. Sasha said that she would not leave her alone, but Andrea then insisted that Sasha should give her a gun. Sasha gave her what she wanted, and the two left Andrea to commit suicide. The shooting sound was then heard.
- According to Holden during her Q&A panel at Chicago's Walker Stalker Con 2014, she was contracted for 8 seasons before the decision of killing Andrea off was brought to the table.
- Andrea is one of seven main characters to never directly kill a main character along with Lori, Dale, Hershel, Eugene, Gareth and Deanna. However, Deanna and Gareth have ordered the execution of another character.