Calificación
Reparto

Ralph Byrd
Dr. Jerry Sheehan

Herbert Rawlinson
Sir James Blake

Joan Barclay
Hope Mason

Lloyd Hughes
Dr. Marshall, 'The Scorpion'

Dickie Jones
Bobby Mason

Lucille Lund
Duchess

Nick Stuart
Julot

Sam Flint
Chief Insp. Henderson

Gail Newbury
Mimi the Policewoman

Jimmy Aubrey
The Hag / Baron Polinka

Theodore Lorch
Daggett, the Butler

George DeNormand
Henchman Pedro

Bob Terry
Henchman Peyton

William Farrel
Count Basil Segaloff

Frank Wayne
Charles, the Footman