The Walking Dead (2010– )
17 user 26 critic

Killer Within 

Lori goes into labour when the prison comes under attack. Michonne tries to convince Andrea to leave Woodbury.


Guy Ferland


Frank Darabont (developed by), Robert Kirkman (based on the series of graphic novels by) | 3 more credits »

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Episode cast overview, first billed only:
Andrew Lincoln ... Rick Grimes
Sarah Wayne Callies ... Lori Grimes
Laurie Holden ... Andrea Harrison
Norman Reedus ... Daryl Dixon
Steven Yeun ... Glenn Rhee
Lauren Cohan ... Maggie Greene
Chandler Riggs ... Carl Grimes
Danai Gurira ... Michonne
Michael Rooker ... Merle Dixon
David Morrissey ... Philip 'The Governor' Blake
Melissa McBride ... Carol Peletier
Irone Singleton ... Theodore 'T-Dog' Douglas
Emily Kinney ... Beth Greene
Lew Temple ... Axel
Scott Wilson ... Hershel Greene


Michonne is intent on leaving Woodbury convinced that there is something out of place there. Andrea isn't so sure she wants to leave and on a map shows Merle the location of the farm where she last saw his brother Daryl. Back at the prison, Herschel is hobbling around with the help of crutches. Suddenly, Rick and the others are having to deal with a major attack by walkers. Someone has set off the prison siren and the group is broken up into twos and threes. Lori goes into labor leaving it to Maggie and Carl to help her deliver the baby. T-Dog and Carol have to face an overwhelming number of walkers while Rick, Daryl and Glenn try to get control of the prison yard. Written by garykmcd

Plot Summary | Plot Synopsis


Drama | Horror | Thriller


TV-MA | See all certifications »

Parents Guide:

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Official Sites:

Official iTunes Season 3





Release Date:

4 November 2012 (USA) See more »

Filming Locations:

Douglasville, Georgia, USA

Company Credits

Show more on IMDbPro »

Technical Specs


| (uncut)

Sound Mix:

Dolby Digital



Aspect Ratio:

16:9 HD
See full technical specs »

Did You Know?


The scene where Maggie must perform a C-section on a still-living Lori in order to save her baby was so troublesome for actress Lauren Cohan that she nearly quit the show. It wasn't until a talk with co-star Steven Yeun that she changed her mind and continued with the show. See more »


Andrea tells the Governor that she "lost" her family (parents and sister), implying that she knows her parents are dead. However, in "Vatos," Andrea and Amy speculate that their parents are still alive - that "maybe Florida wasn't hit so bad." There is no indication that Andrea knows one way or another whether her parents are alive or dead. See more »


[first lines]
Rick Grimes: [Rick gets his group to drive their vehicles within the prison fences] Alright, let's get the other car in. We'll park 'em in the west entry of the yard.
Daryl Dixon: Good. Our vehicles camped out there look like a giant 'vacancy' sign.
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Referenced in The Walking Dead: The Journey So Far (2016) See more »


The Walking Dead Main Title
Written by Bear McCreary
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Frequently Asked Questions

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User Reviews

I cried honest tears.
12 October 2015 | by watch-it-allSee all my reviews

I'll never forget this intense and well-executed episode. It really grabbed me and cut my heart into pieces. The acting is superb, the things going on are riveting, the ending is shocking and so SO sad. It's a roller-coaster of emotions... And not only Rick and his group go through so much in this gut-wrenching episode - I was just ... speechless. Unable to do anything. I just cried honest tears. There is so much going on in this episode, I can't even assimilate it. The director did a great job by writing this emotional piece. Wow... It's also a very brave step from the producers to put in such a controversial scene. What an episode! This show is really captivating, emotional and well-made. I really do enjoy it!

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