Directed by Edward Dmytryk
Written by Ted Fithian, Neil P. Varnick, Griffin Jay, Henry Sucher
Cinematography by George Robinson
Film Editing by Milton Carruth
Music by Hans J. Salter, Frank Skinner
Associate Producer : Ben Pivar
Art Direction by Ralph DeLacy, John B. Goodman
Set Decoration by Russell A. Gausman, Ira Webb
Makeup : Jack P. Pierce
Cast
John Carradine (Dr. Sigmund Walters)
Milburn Stone (Fred Mason)
Evelyn Ankers (Beth Colman)
Lloyd Corrigan (John Whipple)
Acquanetta (Paula Dupree)
Martha Vickers (Dorothy Colemans)
Fay Helm (Nurse Strand)
Vince Barnett (Curly, a rube)
Paul Fix (Gruen, the drunk handler)
Ray Corrigan (Cheela the Ape)
Harry Holman (Ticket Office Clerk)
William Gould (Sheriff)
Gus Glassmire (Coronr)
Ray Walker (Ringmaster)
Fern Emmett (Beth's Murdered Neighbor)
Tom London (Ship's Captain)
Turhan Bey (End Narrator)
Charles McAvoy (Cop)
Anthony Warde (Tony, a handler)
Grant Withers (Veterinarian)