As a whodunit, it's predictable, but that's not the point. This is all about having some fun along the way - about finding humour in awkwardness, about pushing some shallow characters beyond breaking point and enjoying watching them bumble their way through, never far from disaster.

It's a classic diversion, and accomplishes this very well. So put the magnifying glass away Sherlock and have some fun. Steve Martin is at his best when he can't stand up and Martin Short is at his when he's obnoxious. In this show they make fun of themselves to good effect.