Negan Kills Alpha In The Walking Dead, My Favorite Scene of All Time! This took place in the Season 10, mid-season finale of The Walking Dead. In the season 10 finale of The Walking Dead, titled "A Certain Doom," Negan (Jeffrey Dean Morgan) finally got his chance to kill Alpha (Samantha Morton). After leading the Whisperers into a trap and slaying several of them, he cornered Alpha in a cave. And while she begged for her life, to some degree, in [...]