Derrick De Marney plays Slim Callaghan as a poor mans version of Sam Spade or Phillip Marlowe rather unsuccessfully.The air of world wide cynicism may work for Bogart or Dick Powell but it doesn't work for him.This is one of those rather over plotted thrillers where the private eye is always one step ahead of the dimwitted police and the actual killer comes as little surprise when the identity is revealed in the denouement.In the meantime Adrienne Corri is given time to warble a ballad in a nightclub and show a lot of fiery temperament.There is the usual attempt at a funny sidekick,from an actor i do not remember>Michae Balfour who normally fills these roles has a small part as a bartender.Fairly undistinguished all round.