Not the first movie to be built around cameo performances, but these are somewhat novel. Forties stars (Bergman, Bogart, Cagney, etc.) are exhumed from the Hollywood vaults to live again in a new mystery comedy whose convolutions stem not least from forcing various clips from old thrillers to look as though they belong together. Some amusement is derived from watching a film that so obviously had to be worked out backwards. The bits in between feature likeable Martin as a keen but clumsy detective - with all the good lines, which is no bad thing because he's the best part of this fairly amusing, clever exercise in editing.