"A beautiful Russian spy seduces an Austrian military officer in order to obtain secret plans. When she falls in love with him, both are placed in danger."
Greta Garbo
as Tania Fedorova
Conrad Nagel
as Capt. Karl von Raden
Gustav von Seyffertitz
as General Boris Alexandroff
Albert Pollet
as Max Heinrich
Edward Connelly
as Colonel Eric von Raden
Richard Alexander
as General's Aide
Symona Boniface
as Party Guest (uncredited)
Geraldine Dvorak
Nicholai Konovaloff
as Officer Standing at Tania's Table (uncredited)
William H. O'Brien
as Cafe Waiter Serving Wine (uncredited)
Russ Powell
as Carriage Driver (uncredited)
Youcca Troubetzkov
as Russian (uncredited)
Victor Young
as Scarpia in 'Tosca' (uncredited)
Fred Niblo
Director
Margaret Booth
Editor
Bess Meredyth
Adaptation
Marian Ainslee
Writer
Ruth Cummings
Cedric Gibbons
Settings
Gilbert Clark
Wardrobe Designer
Harold S. Bucquet
Assistant Director
William H. Daniels
Director of Photography
Ludwig Wolff
Novel
Treatment