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