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

John Salew

Librarian

Janet Barrow

Mrs. Hobart

Percy Herbert

Farmer

Lynn Tracy

Air Hostess

John Harvey

Hobart's Brother

Alan Beaton

Hyma Beckley

Ballard Berkeley

Ernest Blyth

Wallace Bosco

Daniel Brown

Jimmy Cains

George Curtis

Richard Duke

Shay Gorman

Laurence Hepworth

Walter Horsbrugh

Arthur Howell

Anthony John

Dan Lester

Leonard Llewellyn

Michael Peake

Paul Phillips

Anthony Richmond

Peggy Scott Sanders

Terry Sartain

Leonard Sharp

Bert Simms

Robert Brooks Turner