Dr. Francis Trevelyan
Laurence Harvey
Princess Natasha Romanova
Daliah Lavi
M.I.5 Director
Robert Flemyng
Russian Intelligence Chief
Bernard Archard
American General
Paul Ford
Braithwaite
Michael Trubshawe
Miss Marchbanks
Amy Dalby
M.I.5 Workshop Director
John Forbes-Robertson
Commissionaire
R.S.M. Brittain
Professor
Peter Bayliss
Harold Wilson (voice)
Barry Cryer
Lady Blanchflower
Renée Houston
Stanley Farquhar
Lionel Jeffries
Wrigley
Eric Sykes
British Ambassador
Eric Portman
Pond-Jones
Denholm Elliott
Mrs. Winters
Wanda Ventham
Mrs. Whitby
Marianne Stone
Elsie Farquhar
June Whitfield
Russian Prime Minister
Colin Blakely
Title Designer
Richard Williams
Music
Riz Ortolani
Executive Producer
Joseph E. Levine
Writer
Alan Simpson
Director
Daniel Petrie
Costume Design
Yvonne Blake
Ray Galton
Associate Producer
Robert Porter
Director of Photography
Kenneth Higgins
Producer
Leonard Lightstone
Editor
Jack Slade
Art Direction
Peter Mullins