This Don Knotts and Tim Conway comedy has its share of dumbness, but mixed in are a few comic gems. Knotts and Conway know comedy and can get laughs from even the stupidest of humor just on the strength of their delivery. In this send-up of mysteries and film noir, Knotts and Conway play a pair of detectives investigating a pair of murders at a gloomy mansion. You have to be in a real silly mood to swallow this one, but if you are, a viewing might pay off.