Eduardo Ciannelli
Dr. Van Glock
Onslow Stevens
Dr. Jim Borden
June Vincent
Gwen Runstrom
Ralph Morgan
Dr. Lester Cavigny
Janis Wilson
Nora Cavigny
John Baragrey
Dr. John Reade
Adventure
Horror
The Creeper
Dr. Morgan and Dr. Cavigny star as a brace of scientists who return from the West Indies with a potent, phosphorescent serum that allegedly changes human beings into cats.
