Brock Peters
Matthew Robinson
Miriam Karlin
Winnie Smith
Roy Kinnear
Fred Smith
Bernard Miles
Simpson
John Junkin
Thorley Walters
Tranquilax Executive
Conrad Phillips
Deaf Man
Joan Hickson
Housewife
Peter Sellers
The Rev. John Smallwood
Mark Eden
Sir Geoffrey Despard
Colin Gordon
Prime Minister
Cecil Parker
Archdeacon Aspinall
Eric Sykes
Harry Smith
Ian Carmichael
The Other Smallwood
Miles Malleson
Bishop Rockeby
Kenneth Griffith
Rev. Owen Thomas
William Hartnell
Major Fowler
Irene Handl
Rene Smith
Joan Miller
Mrs Smith-Gould
Gerald Sim
Store Manager
Anna Wing
Housewife
Eric Barker
Bank Manager
Derek Nimmo
DG Assistant
Cardew Robinson
Tramp
Rodney Bewes
Isabel Jeans
Lady Despard
Basil Dignam
Prison Governor
Marianne Stone
Miss Palmer
Nicholas Phipps
DG
John Comer
Butcher
Louis Mansi
Man Buying Groceries (uncredited)
John Harvey
Wilson, Prison Officer (uncredited)