The season finale of Grimm airs tonight. The previous two episodes of the show earned a 1.3, adults 18-49 rating competing head-to-head with Friday night's highest rated show, Shark Tank, and new episodes of Hawaii Five-0. Tonight, it faces less formidable competition from a retrospective of Barbara Waters career on ABC and a repeat of Blue Bloods on CBS. Will escaping the sharks improve Grimm's ratings? Make your prediction.