Dr. Francis Trevelyan

Laurence Harvey

Acting

Princess Natasha Romanova

Daliah Lavi

Acting

Stanley Farquhar

Lionel Jeffries

Acting

Wrigley

Eric Sykes

Acting

British Ambassador

Eric Portman

Acting

Pond-Jones

Denholm Elliott

Acting

Mrs. Winters

Wanda Ventham

Acting

Mrs. Whitby

Marianne Stone

Acting

Elsie Farquhar

June Whitfield

Acting

Russian Prime Minister

Colin Blakely

Acting

M.I.5 Director

Robert Flemyng

Acting

Russian Intelligence Chief

Bernard Archard

Acting

American General

Paul Ford

Acting

Braithwaite

Michael Trubshawe

Acting

Miss Marchbanks

Amy Dalby

Acting

M.I.5 Workshop Director

John Forbes-Robertson

Acting

Commissionaire

R.S.M. Brittain

Acting

Professor

Peter Bayliss

Acting

Harold Wilson (voice)

Barry Cryer

Acting

Lady Blanchflower

Renée Houston

Acting