Peter Reynolds

Stephen

Rona Anderson

Claire

Patrick Barr

Robert

Lana Morris

Marion

Genine Graham

Stella

Michael Balfour

Joe

John Forrest

Wally

Viola Lyel

Mrs. Barclay

Martin Walker

Prof. Barclay

John Le Mesurier

Inspector

Martin Benson

Bruno

Stephen Boyd

Policeman (uncredited)

Ken Hughes