Boom! Buffy the Vampire Slayer fans may now officially start foaming at the mouth: Sarah Michelle Gellar is coming back to TV, and she's ready to kick some ass again. Vulture has learned that CBS just gave a pilot green-light to Ringer, an hour-long thriller that will star the ex-Slayer as a troubled young lass on the run from the mob. She assumes the life of her wealthy twin sister, only to find out that said sibling has a bounty on her head as well. If we're understanding this right, SMG will actually get to play both roles, which could be all sorts of fun. Ringer is from Supernatural writers Eric Charmelo and Nicole Snyder; Gellar will serve as a co-executive producer on the project, which is being produced by ABC Television Studios and CBS Television Studios. It's Gellar's first TV show since Buffy left the air in 2003. She had been attached to an HBO project that didn't work out and has mostly been focusing on features in recent years.