Laurence Harvey
Dr. Francis Trevelyan
Daliah Lavi
Princess Natasha Romanova
Lionel Jeffries
Stanley Farquhar
Eric Sykes
Wrigley
Eric Portman
British Ambassador
Denholm Elliott
Pond-Jones
Wanda Ventham
Mrs. Winters
Marianne Stone
Mrs. Whitby
June Whitfield
Elsie Farquhar
Colin Blakely
Russian Prime Minister
Robert Flemyng
M.I.5 Director
Bernard Archard
Russian Intelligence Chief
Paul Ford
American General
Michael Trubshawe
Braithwaite
Amy Dalby
Miss Marchbanks
John Forbes-Robertson
M.I.5 Workshop Director
R.S.M. Brittain
Commissionaire
Peter Bayliss
Professor
Barry Cryer
Harold Wilson (voice)
Renée Houston
Lady Blanchflower