The group's plan to head for Fort Benning is put on hold when Sophia goes missing.

After Carl is accidentally shot, the group are brought to a family living on a nearby farm. Shane makes a dangerous trip in search of medical supplies.

As Carl's condition continues to deteriorate, Shane and Otis try to dodge the walkers as they head back to the farm.

With Carl recovering, the group puts their focus on finding Sophia. Glenn and Maggie go for a trip to find supplies.

In the woods alone, Daryl finds a clue but is injured and attacked by walkers. Rick questions his choices. Glenn gets mixed signals from Maggie.

Dale confronts Hershel after Glenn tells him about the walkers in the barn. Meanwhile, Lori struggles to come to terms with her pregnancy, and Shane tries to teach Andrea how to use weapons.

Glenn tells the rest of the group about the walkers in the barn, dividing them on what to do. Meanwhile, Hershel sets a deadline for the group to leave, unless Rick does a difficult task.

In the aftermath of the barn incident, the group bury loved ones, Beth falls into shock, and Rick and Glenn head out to find Hershel when he disappears.

Rick, Glenn and Hershel come under enemy fire after their encounter with Dave and Tony. Meanwhile, Shane goes after Lori when everyone realizes she is missing.

Rick and Shane argue over what to do with Randall. Back at the farm, Lori, Andrea and Maggie deal with a suicidal Beth.

Dale fears the group is losing its humanity as Rick and the others vote to execute Randall.

Shane's antagonistic behaviour reaches new heights, while Carl suffers the consequences of his actions.

As the farm is overrun by walkers, the group fights to escape.