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)