Grimm returns tonight after a four month hiatus. The question is whether its audience will return as well. In its favor: a passionate fanbase, weak competition from Touch and fellow genre show Cult. Also, the show finally has an original lead-in, though it is the extremely incompatible Fashion Star. Working against it: going head-to-head with Friday’s powerhouse Shark Tank, being off the air for so long, and airing on NBC in spring 2013. Its fall finale earned a 1.6 adults 18-49 rating. How will it do tonight? Make your predictions.