”We solve mysteries and fight crime,” says Elementary star Jonny Lee Miller aka Sherlock Holmes. “We solve mysteries and stop crimes before they start,” counters Person Of Interest‘s Michael Emerson (Harold Finch). WGN America’s new promo features Elementary stars Miller and Lucy Liu and POI’s Emerson and Jim Caviezel facing off in a test to determine who’s the better twosome and why. The two procedurals join Blue Bloods in the cabler’s Prime Crime lineup this fall. Tribune’s WGN America picked up exclusive off-network rights to the series last year. Check out the clip above. Who wins?