Elenco

John Carradine
Dr. Sigmund Walters

Evelyn Ankers
Beth Colman

Milburn Stone
Fred Mason

Lloyd Corrigan
John Whipple

Fay Helm
Nurse Strand

Martha Vickers
Dorothy Colman

Acquanetta
Paula Dupree, the Ape Woman

Vince Barnett
Curly

Paul Fix
Gruen

Fred Aldrich
Roustabout (uncredited)

Clyde Beatty
Fred Mason (in long shots) (archive footage / uncredited)

Turhan Bey
End Narrator (voice)(uncredited)

Eddie Borden
Dock Spectator (uncredited)

Ray Corrigan
Cheela the Gorilla (uncredited)

Russell Custer
Curley (uncredited)

Fern Emmett
Beth's Murdered Neighbor (uncredited)

Virginia Engels
Trapeze Artist (uncredited)

Alexander Gill
Waiter (uncredited)

Gus Glassmire
Coroner (uncredited)

Joel Goodkind
Small Boy (uncredited)

William Gould
Sheriff (uncredited)

Al Haskell
Al (uncredited)

Harry Holman
Dock Ticket Office Clerk

Tom London
Ship's Captain (archive footage)

Charles McAvoy
Cop (uncredited)

Frank Mitchell
Handler (uncredited)

Charles Morton
Dock Worker (uncredited)

Edward Peil Sr.
Jake - Handler (uncredited)

Stanley Price
Man on Dock (uncredited)

Joey Ray
Attendant (uncredited)

Cap Somers
Roustabout (uncredited)

Ray Walker
Ringmaster (uncredited)

Anthony Warde
Tony - Handler (uncredited)

Grant Withers
Veterinarian (uncredited)
Equipe

Ira Webb
Set Decoration

Russell A. Gausman
Set Decoration

Hans J. Salter
Music Director

Edward Dmytryk
Director

Milton Carruth
Editor

Ben Pivar
Associate Producer

Jack Pierce
Makeup Artist

Neil P. Varnick
Original Story

George Robinson
Director of Photography

Ralph M. DeLacy
Art Direction

Henry Sucher
Screenplay

Ted Fithian
Original Story

Griffin Jay
Screenplay

John B. Goodman
Art Direction

Melville Shyer
Assistant Director

Bernard B. Brown
Sound Director

Frank Mitchell
Stunts

William Hedgcock
Sound

Sam Perry
Music

Ralph Freed
Music

Charles Previn
Music

Hans J. Salter
Music

Frank Skinner
Music

Paul Van Loan
Music

David Klatzkin
Music

Vera West
Costume Design