William 'Stage' Boyd
— Thorwaldt Cornish (as William Boyd)
Claudia Dell
— Enid Van Buren
Huntley Gordon
— Mr. Gordon
John Harron
— Erich (as Johnny Harron)
Hooper Atchley
— Dr. Steven Walcott
Lloyd Whitlock
— Rankin
Phillips Smalley
— Dr. Bronson
Lloyd Ingraham
— Adolph Klein
Henry Hall
— Dr. Barris