שחקנים

• Irene Hervey — Dr. Lynn Harper
• Leif Erickson — Laurie
• Lionel Atwill — Dr. King
• Ralph Morgan — Kurt Ingston
• Don Porter — Dick Baldwin
• Doris Lloyd — Sarah Judd
• Francis Pierlot — Dr. Phipps
• Bela Lugosi — Rolf
• Eddy Waller — Jeb Harmon
• Cyril Delevanti — Torque, the gatekeeper
• Janet Shaw — Milly Carson