Walking Dead: Killer Within

"Killer Within" is the fourth episode of season three of the survival horror series The Walking Dead and the twenty-third episode of the series overall. It was directed by Guy Ferland and written by Sang Kyu Kim. It first aired on the AMC network on Sunday, November 4th, 2012.

Plot
In this episode, Rick discovers that the prisoner he left to be eaten by walkers has opened up the gates to the prison, allowing more herds to converge upon them. While trying to secure the perimeter, one of the group suffers a fatal bite. Meanwhile, Lori goes into labor and Maggie and Carl must find a safe room for her to deliver the baby. In Woodbury, Merle has reason to believe that his brother Daryl is still a live, but the Governor will not allow up to take a scouting party to check it out. Andrea becomes more endeared to the Governor, but Michonne doesn't trust anyone and just wants to get away.

Notes & Trivia

 * This is the fourth episode of The Walking Dead directed by Guy Ferland.


 * This is the first episode of The Walking Dead written by Sang Kyu Kim.


 * Final appearance of T-Dog; dies in this episode.


 * Final appearance of Lori Grimes; dies in this episode.


 * Final appearance of Andrew; dies in this episode.


 * This is the second appearance of The Governor.


 * This is the second appearance of Caesar Martinez.


 * Carol Peletier is considered M.I.A. at the end of this episode.


 * First appearance of Baby Grimes. She will eventually be named Judith and nicknamed "Little Ass-Kicker" by Daryl.

R.I.P.

 * T-Dog - Bitten by a walker; makes a suicide run to protect Carol.
 * Lori Grimes - Dies in childbirth; Shot by Carl before she can become infected.
 * Andrew - Shot in the head by Oscar.