Leslie Howard
Stephen 'Steve' Locke
Kay Francis
Elena Moura
William Gargan
Bob Medill
Phillip Reed
Gaston LeFarge
Irving Pichel
Sergei Pavlov
Ivan F. Simpson
'Poohbah' Evans
Halliwell Hobbes
Sir Walter Carrister
J. Carrol Naish
Commissioner of War Trotsky
Walter Byron
Under Secretary Stanley
Cesar Romero
Tito Del Val
Arthur Aylesworth
Mr. Henry Farmer
Alphonse Ethier
Paul DeVigney
Frank Reicher
Mr. X
Tenen Holtz
Lenin
Doris Lloyd
Lady Carrister
Mary Forbes
Lady Catherine Trehearne
Marina Koshetz
Maria Nikolaievna (as Marina Schubert)
George C. Pearce
Lloyd George (as George Pearce)
Gregory Gaye
Mr. Kolinoff
Paul Porcasi
Count Romano
Glen Cavender
Russian Policeman (uncredited)
Claire McDowell
Woman Saying 'Lenin will Live' (uncredited)