Lots of zombie action in this promo.
Looks like Carl is shooting a zombie woman, not Shane.
here is some fan speculation (?) about what will happen in Nebraska in the comments of this same video, which really rings true, and matches what we have seen in previews:
- The episode starts at the exact same spot the previous one left off. One of the walkers who got shot (the stepmom) tries to grab Beth (Hershel's youngest daughter), but is killed by Andrea with a swift hoe through the head. Shane shouts some more and Hershel tells the group to "LEAVE MY FARM!" for the umpteenth time. Maggie finally slaps Shane right in the face and things cool down somewhat.
- Sophia is buried along with Hershel's dead family members from the barn. T-Dog, Andrea, and Shane pile the other corpses on a truck, drive to a nearby field and burn the bodies in a pyre. Hershel has something of a mental breakdown as he slips out of the farm and goes to a bar in the town to get shitfaced. Beth goes into catatonic shock from the ordeal at the barn, so Rick and Glenn head to town in order to bring Hershel back.
- Meanwhile, Dale tells a skeptical Lori about his suspicions that Shane killed Otis and his belief that Shane will sooner or later kill someone else. Daryl snaps and shouts at Lori when asked to bring Rick and Hershel home quicker, stating he's "done looking for people". Lori heads out by herself, hits a random walker on the way and flips the car into a ditch. It's not shown what happened to her. That's the second (and the last) actual walker we see in the episode.
- Glenn and Rick find Hershel in the bar. After a five-minute rant by a drunk Hershel, two dudes (Tony and Dave) enter the bar. They are bad guys. They inform Glenn, Rick, and Hershel that Fort Benning is overrun and they're heading for Nebraska, which is supposedly safe. "Low population, lots of guns," as they put it.
- The two quickly deduce that Rick and company must have a farm nearby and want to go there because "they've got people to look out for". "That's not gonna happen," says Rick. There's a tense situation, since both guys are armed and threaten to take the farm by force. This culminates with a Clint Eastwood-style gun draw and Rick shoots both guys dead. The scene then cuts to bodies of walkers burning in the pyre. End episode.