- Clark Gable
- Philip Sutherland
- Gene Tierney
- Marya Lamarkina
- Bernard Miles
- Joe Brooks
- Richard Haydn
- Christopher Wellington St. John Denny
- Belita
- Valentina Alexandrovna
- Kenneth More
- Steve Quillan
- Karel Stepanek
- Commissar
- Theodore Bikel
- Lieutenant
- Anna Valentina
- Svetlana Mikhailovna
- Frederick Valk
- Kuragin
- Peter Illing
- N.K.V.D. Man
- Robert Henderson
- U.S. Ambassador
- Stanley Maxted
- John Barnes
- Meinhart Maur
- Lemkov
- Alexis Chesnakov
- General Zhdanov
- Joseph Stalin
- Self
- Martin Benson
- Toasting Russian Officer
- Jim Brady
- Guard at Bolshoi Theatre
- Anton Diffring
- Hotel Desk Clerk
- Anton Dolin
- Marya's Partner
- Richard Marner
- Toasting Russian Officer
- Arthur Mullard
- Russian Policeman
- Christopher Rhodes
- Plainclothes Police Officer at Airport
- Emile Stemmler
- Russian Officers Outside Theatre
- Russell Westwood
- Russian Driver
