Jacques Tourneur

Director

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

Rosamund Greenwood

Mrs. Meek

Brian Wilde

Rand Hobart

Richard Leech

Inspector Mottrarn

Lloyd Lamble

Detective Simmons

Charles Lloyd Pack

Chemist

John Salew

Librarian

Percy Herbert

Farmer

John Harvey

Hobart's Brother

Ballard Berkeley

Wallace Bosco

Shay Gorman

Walter Horsbrugh

Michael Peake

Peter Elliott

Professor K.T. Kumar

Peter Hobbes

Superintendent

Janet Barrow

Mrs. Hobart

Lynn Tracy

Air Hostess

Alan Beaton

Hyma Beckley

Ernest Blyth

Daniel Brown

Jimmy Cains

George Curtis

Richard Duke

Laurence Hepworth

Arthur Howell

Anthony John

Dan Lester

Leonard Llewellyn

Paul Phillips

Anthony Richmond

Peggy Scott Sanders

Terry Sartain

Leonard Sharp

Bert Simms

Robert Brooks Turner