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A 15 episode serial in which Blake battles the "Scorpion" over possession of a 'death ray' machine.
as Dr. Jerry Sheehan
as Sir James Blake
as Hope Mason
as Dr. Marshall, 'The Scorpion'
as Bobby Mason
as Duchess
as Julot
as Chief Insp. Henderson
as Mimi the Policewoman
as The Hag / Baron Polinka
as Daggett, the Butler
as Henchman Pedro
as Henchman Peyton
as Count Basil Segaloff
as Charles, the Footman