Dana Andrews

Dr. John Holden

Peggy Cummins

Joanna Harrington

Niall MacGinnis

Dr. Julian Karswell

Maurice Denham

Professor Henry Harrington

Athene Seyler

Mrs. Karswell

Liam Redmond

Professor Mark O'Brien

Reginald Beckwith

Mr. Meek

Ewan Roberts

Lloyd Williamson

Peter Elliott

Professor K.T. Kumar

Rosamund Greenwood

Mrs. Meek

Brian Wilde

Rand Hobart

Richard Leech

Inspector Mottrarn

Lloyd Lamble

Detective Simmons

Peter Hobbes

Superintendent

Charles Lloyd Pack

Chemist

Jacques Tourneur