Being Human: Season 3, Episode 3

3 - 3: Type 4

On one of her nightly outings, Annie encounters Sasha (Alexandra Roach), a woman who is clearly dead but also corporeal. Sasha follows Annie home, where George, Nina, and Mitchell are stunned to realize Sasha is a zombie (a "Type 4" in the nomenclature of Kemp's organization from Series 2). Sasha refuses to believe she's dead, and Annie tries to help her confront the truth. Meanwhile, Mitchell discovers Sasha isn't the only zombie, and that hospital personnel have performed horrific experiments on the others. (This ties in with the final moments of the previous episode.) Mitchell also discovers he has a groupie, Graham (Tony Maudsley)