Directed by
| George B. Seitz | ||
Writing Credits (in alphabetical order)
| Harold McGrath | ... | (story) |
| Florence Ryerson | ... | (dialogue) |
Cast (in credits order) complete, awaiting verification
| Warner Oland | ... | Dr. Boris Karlov | |
| June Collyer | ... | Kitty Conover | |
| Lloyd Hughes | ... | Prince Nicholas Petroff | |
| Clara Blandick | ... | Abbie Krantz | |
| Hale Hamilton | ... | Martin Kent | |
| Wallace MacDonald | ... | Prince Gregor Petroff | |
| George Fawcett | ... | General Petroff | |
| Florence Lake | ... | Anya Karlov | |
| Mischa Auer | ... | Peter | |
 |
Ernest Hilliard | ... | Prince Ivan Petroff |
| Rest of cast listed alphabetically: | |||
| Ann Brody | ... | Taisya (uncredited) | |
| Julia Swayne Gordon | ... | Aristocrat at Banquet (uncredited) | |
| Ruth Hall | ... | Banquet Guest (uncredited) | |
| Robert Homans | ... | Detective (uncredited) | |
| Murdock MacQuarrie | ... | Stephen - the Butler (uncredited) | |
| Broderick O'Farrell | ... | Dr. Brett (uncredited) | |
| Harry Semels | ... | Karlov's Henchman (uncredited) | |
Produced by
| Phil Goldstone | ... | producer |
Music by
| Val Burton | ... | (uncredited) |
Cinematography by
| Arthur Reed | ||
Editing by
| Otto Ludwig | ||
Art Direction by
| Fay Babcock | ||
Costume Design by
| Elizabeth Coleman | ... | (uncredited) |
Art Department
| Ralph M. DeLacy | ... | settings (as Ralph DeLacy) |
| Edward G. Boyle | ... | property master (uncredited) |
Sound Department
| Corson Jowett | ... | sound recordist (uncredited) |
Music Department
| Val Burton | ... | musical director (uncredited) |
