On screen
Cast
159 credited performers
Boris Karloff
Host
Raymond Adamson
Sheriff
Piers Keelan
Records Clerk
Bill Mills
Prison Guard
Mike Pratt
Mac
Charles Morgan
Chief
William Lucas
Duncan Weaver
Ray Barrett
Dr Alan Whint
Morris Perry
Alastair
Hilda Schroder
Lellie
Michael Bird
Harry
Garfield Morgan
Reception Clerk
Nigel Stock
Dr John Frame
Richard Pasco
Michael Connor
Peter Dyneley
Inspector Slinn
Pauline Yates
Helen Carter
Robert Pitt
Character not listed
Gerald Turner
Character not listed
Roger Snowdon
Robot
Maxine Audley
Dr Susan Calvin
Clifford Evans
Major General Kallner
Hayden Jones
Walensky
Murray Hayne
Peter Bogert
Gerald Flood
Black
Jane Asher
Lee Cross
Richard Gale
Gerry Cross
Peter Wyngarde
Captain Barton
William Marlowe
Bill May
Godfrey James
Perry
Patrick Holt
Selfe
Peter Williams
Commander Delhart
Patrick Allen
Major Peters
Angela Browne
Jean Baron
Walter Randall
Mute-O
John Carson
Roger Carter
Paul Bacon
Security Chief
Keith Anderson
Paul Kirby
Philip Anthony
Alan Richards
Glyn Owen
Frank Nelson
June Shaw
Mary Carter
Louida Vaughan
Darvi
Colin Rix
Control
Alec Ross
Landon
William Gaunt
Bill Sheridan
Julian Glover
Dave Sheridan
Ann Lynn
Betty Madison
Virginia Stride
Miss Hayes
Aubrey Morris
Tyler
Norman Jones
Monroe
Anthony Bate
Garfield
Donald Douglas
Adams
Richard Clarke
Harding
Storm Durr
Pierce
Peter Jesson
Wilson
Jerry Stovin
Dr Polk
Reginald Smith
Janitor
Ken Wayne
Jason Kemper
Martin Wyldeck
Dr Lapham
Jacqueline Hill
Lil Harmon
Nigel Arkwright
Silas Washam
Margo Cunningham
Mrs Culver
Natalie Lynn
Mrs Washam
Alan MacNaughtan
Dr Harmon
Elaine Millar
Donna Culver
Vic Wise
Sam Barrett
Peter Madden
Pienster
Rory MacDermot
Mr Culver
Madeleine Burgess
Ellen
Carl Bernard
Yanvro
Gary Watson
Nathen
Judy Cornwell
Butch
Milo O'Shea
Jacob Luke
Madi Hedd
Dr Trayne
Roger Avon
Major Race
Frank Gatliff
Commander
David Hemmings
Journalist
Reginald Marsh
Colonel Ford
Kenneth Watson
Bud
Richard Wilding
Journalist
Gordon Sterne
Journalist
Blake Butler
Parker
Norman Claridge
Man from the Ministry
Gary Wyler
Alien
Maurice Denham
Edgar Brocklebank
Joan Heath
Harriet Brocklebank
Edward Dentith
Major Bentley
Godfrey Quigley
The Great Vorg
Derek Newark
Inspector Wright
Terence Woodfield
Benjy Hoggin
Jennifer Wilson
Freda Hoggin
Cameron Miller
Mr Hoggin
Robert Lankesheer
Mr Daventry
Richard Klee
Reg Herbert
John Frawley
Furrier
Philip Grout
John
William Job
Harold
David Lander
Schreiber
Evan Thomas
Furrier
Sheena Marshe
Nancy
Barry Wilsher
Shop Assistant
Donald Webster
Youth
William Buck
Reporter
Ivor Bean
Customer
Clive Morton
Sir Gerald Christie
Ann Bell
Jean Bailey
Gerald Harper
Colonel Tanner
Bernard Horsfall
Dr Arthur Bailey
Ian Clark
Sheen
John Barcroft
Burrows
Ronald Radd
Dr Waldron
Norman Scace
Dr Exner
Kenneth Keeling
Passenger
Marc Ashlyn
Security Guard
Barrie Cookson
Dr Howard
John Garvin
Jim Thurgood
Rosemary Miller
Joan Thurgood
Bruce Beeby
Commander Delabo
Keith Pyott
Assistant Commander Lucas
John Moore
Dr Kendal
Jerome Willis
John Irvine
Michael Hawkins
George Chalmers
Yvette Rees
Mrs Chalmers
William Dexter
Superintendent Hartley
Ronald Wilson
DS Grant
Vanessa Thornton
Miss Guthrie
Charlie Bird
Police Sergeant
Gary Raymond
Seldon Bishop
Frank Singuineau
For
Bruce Boa
Monty Archer
John Horsley
Morley
Gary Hope
Roberts
Walter Glennie
Johnston
Vivienne Drummond
Maxine
Annie Saker
Kate Bishop
Jo Rowbottom
Elaine
Christine Shaw
Maggie
Peter Layton
David
Penelope Lee
Pat
Donald Eccles
Father
Ian Shand
Kimonian Man
Jill Melford
Employment Officer
Paul Eddington
Joe Manx
Dinsdale Landen
Jon Hoff
Susan Maryott
Mary Hoff
Philip Madoc
George Mathias
Edwin Finn
Martin
Hugh Janes
Jon
Michael Golden
Jon's Father
Bert Palmer
Joshua
Anne Tirard
Mrs Kane
Ronald Fraser
Oscar Raebone
Charles Gray
Abel Jones
Geraldine McEwan
Mary Jones
Edwin Apps
Mr Crampsey
John Cater
Fred Smith
Alister Williamson
Mr Starling
Patricia Mort
Miss Cook
Jill Curzon
Bubbles
Sheree Winton
Glamour Girl (uncredited)