Many British crime thrillers of the 50s are set in a nightclub.The nightclub in this film is so small and uninhabited that getting a parrot cage in might be difficult a blue budgie cage more likely.Yet again we have an "American policeman" helping Scotland Yard.Obviously the producers in this case could not afford an American actor so instead they brought in an Irishman,Dermot Walsh,who makes a woeful attempt at an American accent.Did the producers really think that this would be enough to sell this to American audiences.John Le Mesurier makes a suitably sinister club owner and Ballard Berkley plays a detective for the umpteenth time.Funny that it was not till he played "The Major" in Fawlty Towers that he ever really became famous.The plot is full of the usual contrivances and twists of the genre and is fairly unmemorable.