The group heads for Fort Benning. But along the way, they run into a herd of zombies and Sophia runs off in fear. Now Rick and the others try to track her down.
After Carl gets shot, Rick and Shane find Dr. Hershel Greene and his family in a nearby house. But Carl has lost too much blood and Hershel doesn't have everything he needs. Could Carl die before the right equipment is found?
While searching for Sophia, Daryl becomes injured and stranded in the middle of the woods. Now he's beginning to see Merle everywhere. Meanwhile Lori has just found out that she's pregnant and she doesn't know how to tell Rick.
Now that Glen knows there are walkers in the barn, Maggie Greene begs him not to tell anyone. Herschel believes that those walkers, which include loved ones, are just sick and may someday be cured. Herschel's isn't the only secret Glen is asked to keep as Lori asks him to go into town and get something for her from the pharmacy. Shane and Andrea head of to a nearby suburb in search of Sophia and their encounter with walkers leads to a new phase in their relationship. Lori finally breaks down and tells Rick that she is pregnant.
Daryl interrogates Randall about his group and he learns that they are formed by thirty dangerous men capable to rape two teenage daughters in front of their father. Rick and Shane decide to kill Randall, who is considered a threat to the survivors, but Dale opposes to their decision and Rick summons the group that is supportive to the execution to vote. Dale tries to convince each survivor that they must not lose their humanity. Carl is affected by the situation and has strange actions: first he sneaks to talk to Randall; then he disrespects Carol with an offensive ...
The group of survivors is organizing the preparation for the winter following the instructions of Rick. Carl is uncomfortable, feeling responsible for the death of Dale and he talks to Shane about what had happened in the swamp. He asks Shane to give the weapon back to Daryl and Shane talks to Rick about the problem. While Rick and Carl are having a conversation, Shane works hard and Lori tells to him that she is not sure whether the baby is his or Rick's. Shane releases Randall and walks with him on the field. Out of the blue, he breaks Randall's neck, hides his body...
Rick and Carl return to the farm but quickly realize that that they are being followed by by a large group of walkers. Mayhem ensues as the humans try to save the farm but they are eventually forced to flee realizing that the it is lost. Several of them do not survive the onslaught and others are separated into small groups. Some are reunited but fed up with the constant bickering and complaints about his leadership, Rick lets it be known that people will now do as they are told. Andrea meanwhile, on her own and separated from the others, is rescued by a hooded ...