<P> Following the Torn Apart series in 2011, another set of webisodes titled Cold Storage were produced and debuted on October 1, 2012, prior to the premiere of Season 3 . </P> <P> A second season had been commissioned in May 2012 . To coincide with a marathon of the show, a special episode was aired in July 2012 following the marathon's end, featuring a tour of the various props / sets used in the third season, as well as cast / crew interviews, and a snippet of exclusive footage featuring the newly introduced character Michonne . </P> <Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 20 </Th> <Td> </Td> <Td> "Seed" </Td> <Td> Ernest Dickerson </Td> <Td> Glen Mazzara </Td> <Td> October 14, 2012 (2012 - 10 - 14) </Td> <Td> 10.87 </Td> </Tr> <Tr> <Td_colspan="7"> Eight months after abandoning Hershel's farmstead, and Lori at the end of her pregnancy, Rick leads the group into securing a prison presently overrun with walkers . While clearing out the cells, Hershel is bitten on the foot by a walker, and they are forced to amputate it to save his life, discovering that five surviving prisoners are present . Meanwhile, Michonne watches over an ailing Andrea . </Td> </Tr> <Tr> <Th> 21 </Th> <Td> </Td> <Td> "Sick" </Td> <Td> Billy Gierhart </Td> <Td> Nichole Beattie </Td> <Td> October 21, 2012 (2012 - 10 - 21) </Td> <Td> 9.55 </Td> </Tr> <Tr> <Td_colspan="7"> Rick's group discuss what to do with the five prison survivors, and initially lock them in a separate but walker - free part of the prison . When the prisoners agree to help them clear walkers, Rick allows them to come, but finds their leader Tomas unstable and is forced to kill him, while abandoning another, Andrew, in a yard full of walkers . The others tend carefully to Hershel's health to make sure he does not turn . </Td> </Tr> <Tr> <Th> 22 </Th> <Td> </Td> <Td> "Walk with Me" </Td> <Td> Guy Ferland </Td> <Td> Evan Reilly </Td> <Td> October 28, 2012 (2012 - 10 - 28) </Td> <Td> 10.51 </Td> </Tr> <Tr> <Td_colspan="7"> Andrea and Michonne witness a group of men investigate a helicopter crash, but are captured by Merle and taken to the fortified town of Woodbury, where they meet The Governor, of whom Michonne is distrustful . One of the survivors of the crash tells The Governor of where their group is based out of, and The Governor leads his men to kill the other group and secure their weapons and vehicles for themselves . </Td> </Tr> <Tr> <Th> 23 </Th> <Td> </Td> <Td> "Killer Within" </Td> <Td> Guy Ferland </Td> <Td> Sang Kyu Kim </Td> <Td> November 4, 2012 (2012 - 11 - 04) </Td> <Td> 9.27 </Td> </Tr> <Tr> <Td_colspan="7"> As Hershel recovers, the prison's alarms go off, and walkers, lured by the sound, overwhelm Rick's group, and they are forced to scatter within the prison, while T - Dog sacrifices himself to protect Carol . Rick, aided by surviving prisoners Oscar and Axel in shutting down the alarms, discovers the walkers were lured through a breach in the prison fence by Andrew, and kills him . Lori, Carl, and Maggie secure themselves in a boiler room as Lori goes into labor . Maggie is forced to perform a Caesarean section to deliver her daughter but which is fatal to Lori, and Carl shoots her to prevent reanimation . As the survivors regroup, Rick is devastated to discover Lori's death . </Td> </Tr> <Tr> <Th> 24 </Th> <Td> 5 </Td> <Td> "Say the Word" </Td> <Td> Greg Nicotero </Td> <Td> Angela Kang </Td> <Td> November 11, 2012 (2012 - 11 - 11) </Td> <Td> 10.37 </Td> </Tr> <Tr> <Td_colspan="7"> Michonne discovers The Governor's secret captivity of walkers, and decides to leave Woodbury, despite Andrea staying behind and learning more about The Governor from his second - hand man, Milton . The Governor, on learning of her departure, has Merle and a group of men try to find her . Meanwhile, Rick is still emotionally upset about his loss when he gets a phone call . </Td> </Tr> <Tr> <Th> 25 </Th> <Td> 6 </Td> <Td> "Hounded" </Td> <Td> Dan Attias </Td> <Td> Scott M. Gimple </Td> <Td> November 18, 2012 (2012 - 11 - 18) </Td> <Td> 9.21 </Td> </Tr> <Tr> <Td_colspan="7"> Rick, still in mourning, seems to receive phone calls in the boiler room from where Lori died, from previous survivors that had died . While evading capture, Michonne witnesses Glenn and Maggie scavenging for baby supplies for Lori's child before they are captured by Merle, who recognizes Glenn as one of the members of his former group that abandoned him in Atlanta . Michonne, having deduced where Glenn and Maggie originated from, takes the supplies to the prison and encounters Rick there . </Td> </Tr> <Tr> <Th> 26 </Th> <Td> 7 </Td> <Td> "When the Dead Come Knocking" </Td> <Td> Dan Sackheim </Td> <Td> Frank Renzulli </Td> <Td> November 25, 2012 (2012 - 11 - 25) </Td> <Td> 10.43 </Td> </Tr> <Tr> <Td_colspan="7"> Though distrustful of her, Rick has Michonne's wounds tended to while she explains Glenn and Maggie's capture and Woodbury . At Woodbury, The Governor harshly interrogates Glenn and Maggie to learn where they are from, and when he threatens to kill Glenn, Maggie reveals the group is at the prison . The Governor sends Merle to scout the prison, while Rick, Daryl, Oscar, and Michonne approach Woodbury . </Td> </Tr> <Tr> <Th> 27 </Th> <Td> 8 </Td> <Td> "Made to Suffer" </Td> <Td> Billy Gierhart </Td> <Td> Robert Kirkman </Td> <Td> December 2, 2012 (2012 - 12 - 02) </Td> <Td> 10.48 </Td> </Tr> <Tr> <Td_colspan="7"> Rick's party invade Woodbury and rescue Glenn and Maggie, where Daryl learns Merle is still alive . Michonne, attempting to kill The Governor, finds he keeps his reanimated daughter Penny still chained up and kills her; The Governor discovers Michonne and they fight, which ends when she stabs him in the eye . Oscar is killed in covering their escape while Daryl is captured and forced into fighting Merle . Meanwhile, a new group of survivors led by Tyreese and Sasha enter the prison through the fence breach . </Td> </Tr> <Tr> <Th> 28 </Th> <Td> 9 </Td> <Td> "The Suicide King" </Td> <Td> Lesli Linka Glatter </Td> <Td> Evan Reilly </Td> <Td> February 10, 2013 (2013 - 02 - 10) </Td> <Td> 12.26 </Td> </Tr> <Tr> <Td_colspan="7"> While Daryl and Merle fight, Rick and Maggie return to Woodbury to free Daryl . They are forced to bring Merle along, which Rick and Glenn fear will harm them, and Daryl and Merle go on their own . The residents of Woodbury begin to question their safety, and Andrea tries to calm The Governor down from taking drastic action . At the prison, the survivors discover Tyreese and Sasha's group, and though wary, allow them to stay . When Rick returns, he is still seeing visions of Lori and becomes angry and violent, and Glenn suggests it is best for the new group to leave . </Td> </Tr> <Tr> <Th> 29 </Th> <Td> 10 </Td> <Td> "Home" </Td> <Td> Seith Mann </Td> <Td> Nichole Beattie </Td> <Td> February 17, 2013 (2013 - 02 - 17) </Td> <Td> 11.05 </Td> </Tr> <Tr> <Td_colspan="7"> Though distrustful of her, The Governor offers to give leadership of Woodbury to Andrea . The Governor secretly leads a group of his men to attack the prison, killing Axel, and breaching the outer fence to allow walkers in . The survivors hold back the attack, forcing The Governor to retreat, while Daryl and Merle, having decided it is best to stay part of the group, arrive to save the other survivors . </Td> </Tr> <Tr> <Th> 30 </Th> <Td> 11 </Td> <Td> "I Ain't a Judas" </Td> <Td> Greg Nicotero </Td> <Td> Angela Kang </Td> <Td> February 24, 2013 (2013 - 02 - 24) </Td> <Td> 11.01 </Td> </Tr> <Tr> <Td_colspan="7"> Andrea learns of the attack on the prison, and demands to go there to try to calm the situation . The Governor allows her to go but with Milton along . En route, they find Tyreese and Sasha's group, and Milton takes them back to Woodbury, where they offer to give The Governor the layout of the prison in exchange for being allowed to stay . At the prison, Andrea explains the situation and that The Governor really wants Michonne, and the group suggests she try to kill The Governor herself before all - out war breaks out . Back in Woodbury, Andrea finds she cannot come to kill The Governor . </Td> </Tr> <Tr> <Th> 31 </Th> <Td> 12 </Td> <Td> "Clear" </Td> <Td> Tricia Brock </Td> <Td> Scott M. Gimple </Td> <Td> March 3, 2013 (2013 - 03 - 03) </Td> <Td> 11.30 </Td> </Tr> <Tr> <Td_colspan="7"> Rick, Carl, and Michonne travel back to Rick's home in King County to gather more weapons for the pending battle, and discover Morgan Jones is still alive, though has lost his son Duane . Rick tries to convince Morgan to return with them, while Michonne protects Carl while he recovers supplies and a personal photograph from a bar . As they return, Rick and Carl realize Michonne is an asset to their group . </Td> </Tr> <Tr> <Th> 32 </Th> <Td> 13 </Td> <Td> "Arrow on the Doorpost" </Td> <Td> David Boyd </Td> <Td> Ryan C. Coleman </Td> <Td> March 10, 2013 (2013 - 03 - 10) </Td> <Td> 11.46 </Td> </Tr> <Tr> <Td_colspan="7"> Andrea arranges a face - to - face meeting between The Governor and Rick, where The Governor demands they turn over Michonne to him . Believing that The Governor wants to kill them regardless, Rick and The Governor prepare their respective groups for combat . </Td> </Tr> <Tr> <Th> 33 </Th> <Td> 14 </Td> <Td> "Prey" </Td> <Td> Stefan Schwartz </Td> <Td> Glen Mazzara & Evan Reilly </Td> <Td> March 17, 2013 (2013 - 03 - 17) </Td> <Td> 10.84 </Td> </Tr> <Tr> <Td_colspan="7"> Andrea learns of The Governor's duplicity and intent to kill Rick's group from Milton, and manages to escape Woodbury to warn Rick, but The Governor is able to capture her just before she reaches the prison . While they are gone, someone burns all of the captured walkers that The Governor has kept, and he suspects either Milton or Tyreese . </Td> </Tr> <Tr> <Th> 34 </Th> <Td> 15 </Td> <Td> "This Sorrowful Life" </Td> <Td> Greg Nicotero </Td> <Td> Scott M. Gimple </Td> <Td> March 24, 2013 (2013 - 03 - 24) </Td> <Td> 10.99 </Td> </Tr> <Tr> <Td_colspan="7"> Rick decides on his own to deliver Michonne to The Governor, discreetly asking Merle for help, but Merle insists he do it alone . As Merle takes Michonne to the spot, Merle becomes sympathetic towards her, and lets her go . Merle uses the opportunity to lead a group of walkers to the meeting point, and then to attack The Governor, but is eventually killed . Michonne returns to the prison and on her way back she meets Daryl telling him that Merle let her go . Daryl goes to the meeting point and finds Merle, now reanimated, before he kills him . Michonne finally arrives back at prison . </Td> </Tr> <Tr> <Th> 35 </Th> <Td> 16 </Td> <Td> "Welcome to the Tombs" </Td> <Td> Ernest Dickerson </Td> <Td> Glen Mazzara </Td> <Td> March 31, 2013 (2013 - 03 - 31) </Td> <Td> 12.42 </Td> </Tr> <Tr> <Td_colspan="7"> The Governor, no longer trusting of anyone, fatally wounds Milton and locks him in the room he has kept Andrea, expecting him to turn and kill her; Milton manages to keep his wits long enough to explain to her how to escape . The Governor leads an attack on the prison, but Rick's group is prepared and ambushes them, forcing The Governor and stragglers to flee; he later kills his own people when they do not want to return and continue the fight . Rick and the others return to Woodbury, and are too late to save Andrea, having been bitten by Milton . She kills herself, and the surviving residents of Woodbury are brought to the prison . </Td> </Tr> </Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> U.S. viewers (millions) </Th> </Tr>

When do they find the prison in walking dead