Starring :

Bessie Love ... Miss Paula White (as Miss Bessie Love)
Lewis Stone ... Sir John Roxton (as Mr. Lewis Stone)
Wallace Beery ... Prof. Challenger (as Mr. Wallace Beery)
Lloyd Hughes ... Edward E. Malone (as Mr. Lloyd Hughes)
Alma Bennett ... Gladys Hungerford (as Miss Alma Bennett)
Arthur Hoyt ... Prof. Summerlee (as Mr. Arthur Hoyt)
Margaret McWade ... Mrs. Challenger (as Miss Margaret McWade)
Bull Montana ... Ape-Man (as Mr. Bull Montana)
Frank Finch Smiles ... Austin (Challenger's butler) (as Mr. Frank Smiles)
Jules Cowles ... Zambo (Roxton's servant) (as Mr. Jules Cowles)
George Bunny ... Colin McArdle (as Mr. George Bunny)
Charles Wellesley ... Maj. Hibbard (as Mr. Charles Wellesley)
Jocko the Monkey ... Jocko
Arthur Conan Doyle ... Himself

Director :

Harry O. Hoyt

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