Il gorilla umano

Lucille Bremer

Kathy Lawrence

Richard Carlson

Ross Stewart

Douglas Fowley

Larson

Ralf Harolde

Fred Hopps

Thomas Browne Henry

Dr. Clifford Porter

Herbert Heyes

Judge Finlay Drake

Gwen Donovan

Madge Bennett

Trevor Bardette

Mr. Purvis - a Patient (uncredited)

Morgan Farley

Mental patient (uncredited)

Kathleen Freeman

Nurse (uncredited)

Dickie Moore

Mental patient (uncredited)

Tor Johnson

'The Champ', a patient (uncredited)

John Holland

Dr. J.R. Bell (uncredited)

Tony Horton

Trooper Captain (uncredited)

Wally Vernon

Maintenance Man (uncredited)