Peter Sellers

The Rev. John Smallwood

Cecil Parker

Archdeacon Aspinall

Isabel Jeans

Lady Despard

Ian Carmichael

The Other Smallwood

Bernard Miles

Simpson

Brock Peters

Matthew Robinson

Eric Sykes

Harry Smith

Irene Handl

Rene Smith

Miriam Karlin

Winnie Smith

Joan Miller

Mrs Smith-Gould

William Hartnell

Major Fowler

Roy Kinnear

Fred Smith

John Harvey

Wilson, Prison Officer

Joan Hickson

Housewife

Eric Barker

Bank Manager

John Comer

Butcher

Kenneth Griffith

Rev. Owen Thomas

Mark Eden

Sir Geoffrey Despard

Basil Dignam

Prison Governor

Colin Gordon

Prime Minister

Geoffrey Hibbert

Council Official

Ludovic Kennedy

Himself

Malcolm Muggeridge

Cleric

Harry Locke

Shop Steward

Derek Nimmo

DG Assistant

Conrad Phillips

Deaf Man

Miles Malleson

Bishop Rockeby

Nicholas Phipps

DG

Thorley Walters

Tranquilax Executive

Marianne Stone

Miss Palmer

Cardew Robinson

Tramp

Gerald Sim

Store Manager

Anna Wing

Housewife (uncredited)

John Junkin

Reporter at Space Launch Site (uncredited)

Rodney Bewes

Milkfloat Driver (uncredited)

Steve Marriott

Jack (uncredited)

John Louis Mansi

Man Buying Groceries (uncredited)

Jack Carter

Launch Site Worker (uncredited)