A killer called 'The Dark Man' commits double murder. This is witnessed by the young aspiring actress Molly Lester. The Dark Man tries everything to put Molly out of the way. Detective Inspector Viner of Scotland Yard investigates the murders.

• Independent Artists
• Edward Underdown
• Maxwell Reed
• Natasha Parry
• William Hartnell
• Barbara Murray
• Robert Long
• Cyril Smith
• Leonard White