On this episode of The Walking Dead...
Carol, Tyreese, Lizzie, Mika and Judith discover a home at which they can take shelter.
Lizzie remains increasingly incapable of understanding what walkers are. After playing tag with one, she freaks out after Carol kills it.
To show Carol that everything is OK, Lizzie kills Mika acknowledging she'll come back.
Carol speaks with Tyreese and determines the only thing left to do is kill Lizzie. Carol takes Lizzie out to the field and shoots her.
Distraught, Carol admits to Tyreese that she killed Karen, even giving him a gun to accept the consequences. He admits that he forgives her, but will never forget.
The two bury Lizzie and Mika and continue back on the train tracks.