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