Cast
- Herbert Marshall as Dr. Stephen Dominik
- Ruth Chatterton as Professor Anna Mathe
- Simone Simon as Marie Claudel
- Constance Collier as Professor Augusta Wimmer
- J. Edward Bromberg as Dr. Spindler
- Dixie Dunbar as Luisa
- John Qualen as Toni
- Shirley Deane as Fritzi
- Tyrone Power as Count Vallais
- Frank Reicher as Dr. Hoffenreich
Crew
- Irving Cummings · Director
- Gene Markey · Writer
- Ladislas Fodor · Writer
- Merritt B. Gerstad · Cinematographer
- Jack Murray · Editor