Cast
- Boris Karloff
- Mr. Wong
- Grant Withers
- Capt. Street
- Maxine Jennings
- Myra
- Evelyn Brent
- Olga
- George Lloyd
- Devlin
- Lucien Prival
- Mohl
- John St. Polis
- Roemer
- William Gould
- Meisle
- Hooper Atchley
- Wilk
- John Hamilton
- Dayton
- Wilbur Mack
- Russell
- Lee Tong Foo
- Tchin
- Lynton Brent
- Tommy
- Grace Wood
- Mrs. Roemer
- Frank Bruno
- Lescardi
- Ed Cassidy
- Ambulance Doctor
- Wheaton Chambers
- Chemistry Lab Director
- Clancy Cooper
- Warehouse Man
- George DeNormand
- John
- Lester Dorr
- Coroner
- Herbert Evans
- Wilk's Butler
- Dick Reinhart
- Dock Worker
