"Welcome to the Tombs"
The Governor kills Milton and leaves him locked in a room with Andrea so he can attack her when he reanimates. Andrea kills Milton after he bites her, and then she shoots herself to prevent her own reanimation.
"Welcome to the Tombs"
The Governor leads an assault on the prison.
"This Sorrowful Life"
Daryl kills his brother, Merle, who was turned into a zombie.
"This Sorrowful Life"
Maggie and Glenn get engaged.
"Prey"
Someone sets fire to the pit of walkers the Governor has kept as a weapon.
"Prey"
Andrea leaves Woodbury to warn the prison group about the Governor's attack, but is captured before she can get there. The Gov locks her up in his torture shack.
"Arrow on the Doorpost"
Rick and the Governor meet face-to-face.
“Home”
The Governor attacks the prison, killing Axel and driving through the prison's gates, allowing walkers to enter the yard.
"The Suicide King"
Rick sees the ghost of Lori.
"Made to Suffer"
The Governor forces Daryl and Merle to fight in front of a crowd…to the death.
"Made To Suffer”
Michonne discovers the Governor is keeping his undead daughter locked up in the closet. Michonne kills her, and during a struggle with the Gov, puts a piece of glass through his eye.
“When the Dead Come Knocking”
Merle locks Glenn in a room with a walker after he refuses to give up the prison location.
"Hounded"
Rick talks to dead survivors through a rotary phone, including Lori and Shane.
"Hounded"
Merle captures Glenn and Maggie.
"Killer Within"
Carl shoots Lori in the head after she dies so she does not turn into a walker.
"Killer Within"
Lori gives birth, dying soon after.
"Killer Within"
T-Dog sacrifices his life to save Carol and is killed by zombies.
"Walk with Me"
The Governor has aquariums filled with live heads of walkers.
"Walk with Me"
The Governor ambushes Welles' squad and kills them all.
"Seed"
Zombies at the prison are wearing riot gear, which makes killing them much harder.
"Seed"
Rick removes Hershel's leg at the knee after he is bitten by a walker.
"Beside the Dying Fire"
It is revealed that the group is hiding out right by a prison—the setting for season three.
"Beside the Dying Fire"
Andrea separated from the group, fights off walkers in the woods and is rescued by Michonne.
"Beside the Dying Fire"
The group of survivors are separated and chased off of Hershel's farm.