The Rev. John Smallwood
Peter Sellers
Archdeacon Aspinall
Cecil Parker
Major Fowler
William Hartnell
Fred Smith
Roy Kinnear
Wilson, Prison Officer
John Harvey
Housewife
Joan Hickson
Bank Manager
Eric Barker
Butcher
John Comer
Rev. Owen Thomas
Kenneth Griffith
Sir Geoffrey Despard
Mark Eden
Prison Governor
Basil Dignam
Prime Minister
Colin Gordon
Lady Despard
Isabel Jeans
Council Official
Geoffrey Hibbert
Himself
Ludovic Kennedy
Cleric
Malcolm Muggeridge
Shop Steward
Harry Locke
DG Assistant
Derek Nimmo
Deaf Man
Conrad Phillips
Bishop Rockeby
Miles Malleson
DG
Nicholas Phipps
Tranquilax Executive
Thorley Walters
Miss Palmer
Marianne Stone
The Other Smallwood
Ian Carmichael
Tramp
Cardew Robinson
Store Manager
Gerald Sim
Housewife (uncredited)
Anna Wing
Reporter at Space Launch Site (uncredited)
John Junkin
Milkfloat Driver (uncredited)
Rodney Bewes
Jack (uncredited)
Steve Marriott
Man Buying Groceries (uncredited)
Louis Mansi
Launch Site Worker (uncredited)
Jack Carter
Simpson
Bernard Miles
Matthew Robinson
Brock Peters
Harry Smith
Eric Sykes
Rene Smith
Irene Handl
Winnie Smith
Miriam Karlin
Mrs Smith-Gould
Joan Miller
Director
Roy Boulting
Producer
John Boulting
Screenplay
Editor
Teddy Darvas
Director of Photography
Mutz Greenbaum
Frank Harvey
Idea
Original Music Composer
Richard Rodney Bennett
Still Photographer
Laurie Ridley