Mark of the Gorilla

Johnny Weissmüller

Jungle Jim

Trudy Marshall

Barbara Bentley

Suzanne Dalbert

Nyobi

Onslow Stevens

Professor Brandt

Robert H. Purcell

Kramer

Pierce Lyden

Gibbs

Neyle Morrow

Head Ranger

Selmer Jackson

Warden Frank R. Bentley

William Bailey

Game Preserve Officer

George Barrows

Henchman

Steve Calvert

Gorilla Man

Jimmy the Crow

Caw-Caw the Crow