Trailer
Cast
Arthur Hoyt
Prof. Summerlee
Jules Cowles
Zambo
Arthur Conan Doyle
Himself
Nelson McDowell
Lawyer
Alma Bennett
Gladys Hungerford
Lewis Stone
Sir John Roxton
Margaret McWade
Mrs. Challenger
Gilbert Roland
Extra
Bessie Love
Paula White
Wallace Beery
Prof. Challenger
Bull Montana
Ape Man
Leo White
Percy Potts
Virginia Brown Faire
Marquette
Lloyd Hughes
Edward E. Malone