Peter Reynolds

Character: Stephen

Rona Anderson

Character: Claire

Patrick Barr

Character: Robert

Lana Morris

Character: Marion

Genine Graham

Character: Stella

Michael Balfour

Character: Joe

John Forrest

Character: Wally

Viola Lyel

Character: Mrs. Barclay

Martin Walker

Character: Prof. Barclay

John Le Mesurier

Character: Inspector

Martin Benson

Character: Bruno

Stephen Boyd

Character: Policeman (uncredited)