This is where we see the beginnings of the great movie villain that Shaw was to become in this British B thriller.

Shaw is mesmeric as Marlow, who kidnaps a young boy and plants a timer bomb in a toy as he tries to extort money out of wealthy businessman Anthony Chester. Robert gives a quietly brooding performance in a cockney accent and the only sad thing is he's only in half the film. 

The tension lasts until the final reel as the clock ticks down. John Gregson is excellent as the dogged detective who works through the night to find and save the child. 

It's well made with a good ensemble cast and script and is perhaps the first real meaty role Shaw had in his film career and he pulls it off with flying colours.