Lifetime released the first official trailer of thriller series “You” based on the best-selling book of the same name by Caroline Kepnes. From executive producers Greg Berlanti and Sera Gamble, the show follows a twisted, obsessive love story about a man who uses the hyper-connectivity of today’s world to make a woman fall for him. “You” stars Penn Badgley, Elizabeth Lail, Shay Mitchell, Luca Padovan, and Zach Cherry, with a special guest appearance by John Stamos. It premieres September 9.