Night of the Prowler. (1962 film).

When the director of a successful racing car company is shot dead the other directors have reason to believe their lives are at risk too.

Patrick Holt as Robert Langton
Colette Wilde as Marie Langton
Bill Nagy as Paul Conrad
John Horsley as Detective Inspector Cameron
Benny Lee as Benny
Marianne Stone as Mrs. Cross
Mark Singleton as Anders
John Dunbar as Davies
Robin Wentworth as Watts
Tony Wager as Detective Sergeant Baker
Jo Rowbottom as Elsie
Mitzi Rogers as Jacky Reed

Director: Francis Searle