Diretor/a
Val Guest
DIRETOR/A
Elenco (na ordem dos créditos)
Brian Donlevy
Quatermass
John Longden
Lomax
Sidney James
Jimmy Hall
Bryan Forbes
Marsh
William Franklyn
Brand
Vera Day
Sheila
Charles Lloyd Pack
Dawson
Tom Chatto
Broadhead
John Van Eyssen
The P.R.O.
Percy Herbert
Gorman
Michael Ripper
Ernie
John Rae
McLeod
Marianne Stone
Secretary
Ronald Wilson
Young Man
Jane Aird
Mrs. McLeod
Betty Impey
Kelly
Lloyd Lamble
Inspector
John Stuart
Commissioner
Gilbert Davis
Banker
Joyce Adams
Woman M.P.
Edwin Richfield
Peterson
Howard Williams
Michaels
Phillip Baird
Lab. Assistant
Robert Raikes
John Fabian
Intern
George Merritt
Super
Arthur Blake
Constable
Michael Balfour
Harry
John Adams
Policemanuncredited
Chris Adcock
Workeruncredited
Peter Brace
Guarduncredited
Jim O'Brady
Daniel Brown
Tony Castleton
Leslie Crawford
Vernon Greeves
First Manuncredited
George Hilsdon
Jan Holden
Young Girluncredited
Arthur Howell
Alastair Hunter
Labour MPuncredited
Barry Lowe
Chrisuncredited
Fred Machon
VIP at Research Plantuncredited
Frank Maher
Police Sergeant Escorting Suspectuncredited
Colin McKenzie
Jim Morris
Police Sergeantuncredited
Norman Morris
Internuncredited
Cecil Paul
Henry Rayner
Drunkuncredited
Joan Schofield
Woman Shopperuncredited
Charles Stevenson
Alfred Wright
Paula Wright