The Dwight Schrute-centered Office spin-off The Farm may not have been picked up by NBC, but you can still expect to see Rainn Wilson in primetime this fall. Where will the quirky funnyman go after years of playing one of the all-time great sitcom villains? A CBS detective drama, of course. Wilson will play an overweight investigator with an anger problem in the lead role of Backstrom, based on a popular Swedish detective series. Just try to imagine a slightly less comical Dwight Schrute in the lead role of CSI: Sweden …