Hjalmar Poelzig (as Karloff)
Dr. Vitus Werdegast
Peter Alison
Joan Alison (as Jacqueline Wells)
The Majordomo
Thamal
Karen
The Sergeant
The Lieutenant
Cultist (uncredited)
Train Steward (uncredited)
Car Steward (uncredited)
Cult Organist (uncredited)
Train Conductor (uncredited)
Bus driver (uncredited)
Bit Part (uncredited)
Maid (uncredited)
Brakeman (uncredited)
Girl (uncredited)
Cultist Binding Joan (uncredited)
Patrolman (uncredited)
Train Porter (uncredited)
Waiter (uncredited)
Stationmaster (uncredited)