Ben F. Wilson as John Shirley

Neva Gerber as Polly Marion

Francis McDonald as 'Red' Warren

Joseph W. Girard as Dr. Reynolds

Nigel De Brulier as Professor Duval

Howard Crampton as Captain Cronin

William Quinn as Emil LaRoux

Irene Hunt as Mrs. Reynolds

Ernest Shields as Howard Van Cleft

Hoot Gibson as

Josephine Hill as

Evelyn Selbie as Pale Ida

L.M. Wells as Professor Montague

William Canfield as William Grimsby

Frank MacQuarrie as Alvin Van Cleft

Frank Tokunaga as

Lew Short as Short

Willard Wayne as Wayne

Charles Dorian as Dorian

Wadsworth Harris as James Walsh