<P> Tyreese (Chad L. Coleman), Carol (Melissa McBride), and sisters Lizzie (Brighton Sharbino) and Mika (Kyla Kenedy) continue their journey to Terminus along the railroad tracks, while caring for Rick's toddler daughter Judith . Carol and Tyreese are concerned for the survival of Mika and Lizzie, as Mika is too gentle and Lizzie appears to not understand what walkers are . They spot a walker get snarled on the train tracks, and Lizzie pleads with Tyreese to spare it . Nearby, they find an abandoned home in a pecan grove, Carol suggesting they may want to rest there a few days . While Tyreese and Carol clear the house of walkers, a walker approaches the sisters; Mika is quick to shoot it in the head, while Lizzie looks on with tears . They secure the perimeter of the house and settle in . </P> <P> The following day, Carol sees Lizzie attempting to play tag with a walker, and she runs out and kills it . Lizzie yells at her for killing her friend . Later, Carol takes Mika to hunt, but she cannot bring herself to shoot a deer . When they return, they find Tyreese has gotten the water pump working, and he suggests they may want to settle here permanently . Later that day, Lizzie and Mika go back to the train tracks, and Lizzie feeds the trapped walker a mouse; she moves in closer, preparing to let the walker bite her, telling Mika that the walkers "want (her) to change", but a group of walkers suddenly appear and the two flee back to the house . Their screams prompt Carol and Tyreese outside and the four eliminate the walkers . Later that evening, Carol talks with Lizzie about why the walkers are dangerous and why it is necessary to kill them . Mika says she does not want to "be mean" by killing people . Lizzie tells her you have to, but only sometimes . </P> <P> Carol and Tyreese leave Judith in the care of the sisters as they go hunt . When they return, they find that Lizzie has killed Mika with a knife . Lizzie, looking happy, says it's okay because "she'll come back". Lizzie tries to prevent them from interfering by holding a gun at them, insisting that Mika will be okay since she did not stab her brain . Carol calms Lizzie down enough to obtain the gun, and asks her to take Judith and go inside with Tyreese while she ties Mika up so she doesn't go anywhere . Lizzie said she was going to do the same to Judith but Carol calmly points out that she can't even walk yet . Lizzie agrees and goes with Tyreese . Carol starts to cry as she mourns over Mika and slowly pulls out her knife to stab her . Later, Carol and Tyreese discuss what to do with Lizzie; he says she admitted to luring walkers to the prison fence using rats as bait . It was also Lizzie who made the bizarre splayed rabbit effigy back at the prison . Tyreese wonders if she was the one responsible for killing Karen and David but Carol professes that Lizzie is innocent, however she still poses a threat to Judith . Tyreese offers to take Judith and continue on to Terminus but Carol says Judith needs them both . They both conclude Lizzie is too dangerous to be around other people . </P> <P> The next day, Carol asks Lizzie to come outside to get some flowers for Mika . Lizzie realizes Carol is upset at her and thinks it is because she pointed a gun at her . Lizzie starts crying and saying she was sorry but Carol, now crying also, insists she look at the flowers . She then shoots Lizzie in the back of the head, and buries hers and Mika's bodies . She returns to the house and gives the gun to Tyreese, admitting she had killed Karen and David to prevent the spread of infection at the prison . She tells Tyreese to do whatever he needs to do . After asking her if Karen suffered, he says won't forget but he forgives her because it is in the past . The next day, Carol and Tyreese leave the house and continue towards Terminus . </P>

The walking dead carol look at the flowers