Rick leads the group out of Atlanta; the group is stopped by a threat unlike anything anyone has seen before; the search for someone who has gone missing.
Rick discovers a possible safe haven; Shane must go on a dangerous mission to get needed medical supplies.
The group awaits Shane's return; Shane finds himself trapped in a school; Daryl and Andrea search for someone in the woods.
Shane makes a deadly sacrifice that inspires unusual behavior and self-distancing; the rest of the group struggles to find the balance between living to die and dying to live.
Rick and the other survivors continue searching for Sophia; Hershel disagrees with the group's plan and tells them they are only welcome at the farm temporarily.
Glenn knows too much for his comfort level; Daryl finds a sign of life and tries to make it back to the farm alive.
Secrets are told and revealed; Hershel refuses to acknowledge the world's new reality; Andrea comes out of her shell; everything is food for something.
Rick and the others try to restore order after a terrible discovery; Hershel takes up an old habit and disappears.
Enemies trap Rick, Hershel and Glenn, who fight to survive; when everyone realizes she is missing, Shane goes after Lori and finds her in danger.
Rick and Shane are in conflict over the fate of an outsider; Andrea helps Hershel's daughter face a crucial decision.
Rick sides with Shane causing Dale to worry that the group is losing its humanity; Carl's actions have unintended consequences.
When the group learns that someone dangerous may be loose near the farm, Rick, Shane, Daryl and Glenn try to keep everyone safe; Shane's antagonism grows and Carl faces the consequences of his actions.