But it really is!
This is a fast-paced comedy/mystery starring Lloyd Nolan as Private Eye Michael Shayne, attempting to solve a double-murder. Nolan seems to figure everything out before the bewildered police inspector, played by William Demarest. The banter between Nolan and Demarest is great. Demarest rolls with the punches, getting conked on the noggin twice, and even getting a chair wrapped around his head. Mary Beth Hughes appears in a subplot as Shayne's fiancée, but their wedding plans keep getting interrupted by Shayne's pursuit of the killer (whose identity did surprise me). Milton Parsons has a juicy part, and Henry Daniell shows a flare for slapstick. Mantan Moreland is hysterical, and I do hope that he laughed all the way to the bank given the roles he was given during his career. Don't think too hard about this one, and you'll have a good time.
I have to admit, though, that just once, it would be interesting if the dumb police inspector actually turned out to be the killer. Now that would be a real surprise. And no, I don't think I'm spoiling anything by saying that.