Not much is known about Seth's life before the apocalypse except that he had been trained "to survive" by his father and that he has lived on Catrina Island, California for all of his life.
Seth was out somewhere on the island when the Abigail docked. He makes a brief appearance, saying hello to Madison, before disappearing again. He is not seen again until the following day, when he shows Chris how to kill walkers with a pickaxe.
Later, and unaware of his parents wishes, Seth manages to get on Abigail and points his rifle at Travis to try to get to Harry. The last we see of him is on the dock with his little brother after killing his infected mother.
This list shows the victims Seth has killed:
- The casting call for this character used the name Sam Russell.