Elenco e equipe
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Nelson EddyPrince Peter Karagin - Ilona MasseyLydia Pavlovna Marakova
- Charles RugglesNicki Popoff
- Frank MorganIvan Danchenoff
- Lionel AtwillProf. Marakov
- C. Aubrey SmithGen. Karagin
- Joyce ComptonMasha
- Dalies Erhardt FrantzDimitri Marakov
- Walter Woolf KingCapt. Michael Sibirsky
- Phillip TerryLt. Smirnoff
- Frederick WorlockRamensky
- Abner BibermanLeo Proplinski
- Arthur W. CernitzCapt. Sergei Pavloff
- Roland VarnoLt. Nikitin
- George TobiasSlaski
- Paul SuttonAnton
- Willy CastelloCapt. Testoff
- Paul IrvingPrince Morodin
- Mildred ShayJeanette Sibirsky
- Alma KrugerMrs. Danchenoff
- Zeffie TilburyPrincess Natalya Petrovna
- Reinhold SchünzelDireção
- Lawrence WeingartenProdução
- Leon GordonRoteiro
- Charles BennettRoteiro
- Jacques DevalRoteiro