O Inimigo X

Clark Gable

McKinley B. 'Mac' Thompson

Hedy Lamarr

Golubka / Theodore Yahupitz / Lizvanetchka 'Lizzie'

Oskar Homolka

Commissar Vasiliev

Felix Bressart

Igor Yahupitz / Vanya

Eve Arden

Jane Wilson

Sig Ruman

Emil Von Hofer

Natasha Lytess

Olga Milanova

Vladimir Sokoloff

Michael Bastakoff

Edgar Barrier

Rubick

Georges Renavent

Laszlo

Leon Belasco

Comrade Baronoff

Michael Mark

Goronoff