The mystery here is not very compelling, which leaves the abundant comedy part that mostly is. Okay, I know the Moreland ("Feets don't fail me now !") brand of silliness is as politically incorrect as can be. But his bits, especially with Ben Carter, are still pretty funny, stereotypes aside. Too bad the weird-looking Milton Parsons (Johnson) doesn't get more screen time. Between him and the jolting Skelton Knaggs, they had the graveyard types of the 1940's all wrapped up.
Seems an innocent man is about to be executed for a robbery and murder he didn't commit. So Charlie has a deadline to meet in clearing him. No dark houses or secret passages here, but there is a prop room full of weird theatrical props (probably Monogram's). Of course, the props meet up with Birmingham (Moreland) creating lots of amusing setups. Fortunately, soon-to-be cult director Karlson keeps things moving in smooth fashion, so we barely notice the skimpy whodunit part. All in all, it's one of the lesser Chan mysteries, but still has compensations.