It's fucking incredible. Tatiana Maslany stars as a woman who witnesses someone who looks exactly like her jump in front of a train. She steals a handbag the deceased left behind on the platform, and assumes her identity, who she later finds out is a (possibly) crooked detective. At first you think it's some long lost twins shit, but pretty soon you realize there's a supernatural element at play, and that's all I'll say about that. Just stop reading this and watch the show. LOL at her learning to speak American in ten minutes. Oh, and her scumbag ex-boyfriend looks like Jim Jones