Fred Niblo
Marian Ainslee
Ruth Cummings
William H. Daniels
Greta Garbo
Tania Fedorova
Conrad Nagel
Capt. Karl von Raden
Gustav von Seyffertitz
General Boris Alexandroff
Albert Pollet
Max Heinrich
Edward Connelly
Colonel Eric von Raden
Richard Alexander
General's Aide
Symona Boniface
Party Guest (uncredited)
Geraldine Dvorak
Party Guest (uncredited)
Nicholai Konovaloff
Officer Standing at Tania's Table (uncredited)
William H. O'Brien
Cafe Waiter Serving Wine (uncredited)
Russ Powell
Carriage Driver (uncredited)
Youcca Troubetzkov
Russian (uncredited)
... and 1 more
CinemaSerf
Were it not for the unbelievably naff ending, this could be one of the best espionage thrillers I've ever seen! As it is, Greta Garbo is still super as the Mata Hari style agent for the Czar out to obtain secrets from the Austro-Hungarian empire. After she shares a box with him at the opera, "Tania"...
Metro-Goldwyn-Mayer