Clone clubbers unite -- BBC America's underdog hit "Orphan Black" returns for a second season on Saturday, April 19th at 9pm. The enjoyably clever sci-fi series, created by Graeme Manson and John Fawcett, stars breakout actress Tatiana Maslany as a woman who discovers she's one of many physically identical but very different clones caught in a war between two mysterious groups. The trailer below features some new faces and a lot of Maslany in her many roles, including a recent one as "Proclone" Rachel. Check it out below: