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

Spencer Gordon Bennet