What is the title of the episode where Carol kills Lizzie?

The episode in which Carol kills Lizzie is “The Grove,” a season-four episode of The Walking Dead. It aired on AMC on March 16, 2014, and focuses on Carol, Tyreese, Mika, and Lizzie after the prison community has been scattered.

The group finds a temporary refuge at a pecan farm, creating a brief illusion of safety. Lizzie, however, cannot understand that walkers are dangerous and increasingly treats them as friends. Her inability to distinguish the living from the dead becomes more alarming after she kills her younger sister, Mika, believing she will come back as a walker.

Carol realizes that Lizzie is too dangerous to leave with the group. She takes Lizzie outside, tells her to look at the flowers, and shoots her. The scene is one of the series’ most disturbing examples of survival forcing adults to make impossible moral choices.

“The Grove” is sometimes confused with “Internment,” the earlier prison episode about the flu outbreak. “Claimed” is another season-four episode, but it follows Rick, Michonne, and Carl during the post-prison journey.