Dr. Sigmund Walters
Beth Colman
Fred Mason
John Whipple
Nurse Strand
Dorothy Colman
Paula Dupree, the Ape Woman
Curly
Gruen
Roustabout (uncredited)
Fred Mason (in long shots) (archive footage / uncredited)
End Narrator (voice)(uncredited)
Dock Spectator (uncredited)
Cheela the Gorilla (uncredited)
Curley (uncredited)
Beth's Murdered Neighbor (uncredited)
Trapeze Artist (uncredited)
Waiter (uncredited)
Coroner (uncredited)
Small Boy (uncredited)
Sheriff (uncredited)
Al (uncredited)
Dock Ticket Office Clerk
Ship's Captain (archive footage)
Cop (uncredited)
Handler (uncredited)
Dock Worker (uncredited)
Jake - Handler (uncredited)
Man on Dock (uncredited)
Attendant (uncredited)
Roustabout (uncredited)
Ringmaster (uncredited)
Tony - Handler (uncredited)
Veterinarian (uncredited)
Set Decoration
Music Director
Set Decoration
Director
Director of Photography
Makeup Artist
Art Direction
Original Story
Editor
Associate Producer
Art Direction
Screenplay
Screenplay
Original Story
Music
Music
Music
Sound Director
Music
Stunts
Music
Assistant Director
Music
Sound
Music
Costume Design
