Dr. John Holden

Dana Andrews

Acting

Joanna Harrington

Peggy Cummins

Acting

Dr. Julian Karswell

Niall MacGinnis

Acting

Professor Henry Harrington

Maurice Denham

Acting

Mrs. Karswell

Athene Seyler

Acting

Professor Mark O'Brien

Liam Redmond

Acting

Mr. Meek

Reginald Beckwith

Acting

Lloyd Williamson

Ewan Roberts

Acting

Professor K.T. Kumar

Peter Elliott

Acting

Mrs. Meek

Rosamund Greenwood

Acting

Rand Hobart

Brian Wilde

Acting

Inspector Mottrarn

Richard Leech

Acting

Detective Simmons

Lloyd Lamble

Acting

Superintendent

Peter Hobbes

Acting

Chemist

Charles Lloyd Pack

Acting

Librarian

John Salew

Acting

Mrs. Hobart

Janet Barrow

Acting

Farmer

Percy Herbert

Acting

Air Hostess

Lynn Tracy

Acting

Hobart's Brother

John Harvey

Acting

Alan Beaton

Acting

Hyma Beckley

Acting

Ballard Berkeley

Acting

Ernest Blyth

Acting

Wallace Bosco

Acting

Daniel Brown

Acting

Jimmy Cains

Acting

George Curtis

Acting

Richard Duke

Acting

Shay Gorman

Acting

Laurence Hepworth

Acting

Walter Horsbrugh

Acting

Arthur Howell

Acting

Anthony John

Acting

Dan Lester

Acting

Leonard Llewellyn

Acting

Michael Peake

Acting

Paul Phillips

Acting

Anthony Richmond

Acting

Peggy Scott Sanders

Acting

Terry Sartain

Acting

Leonard Sharp

Acting

Bert Simms

Acting

Robert Brooks Turner

Acting