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