Sir James Blake has retired from Scotland Yard so that he can assist his niece Hope and her friend Jerry in developing an apparatus they have invented. Sir James thinks that their invention has the potential to prevent wars, and plans to donate it to the League of Nations. But a gang of criminals led by the elusive "Scorpion" steals the device, and Blake and his associates must recover the invention and determine the identity of the "Scorpion".
Directed by Robert F. Hill
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Cast

Ralph Byrd
Jerry Sheehan

Joan Barclay
Hope Mason

Lloyd Hughes
Doctor Marshall

Dickie Jones
Bobby Mason

Lucille Lund
Duchess

Nick Stuart
Julot

Sam Flint
Chief Insp. Henderson
Gail Newbury
Mimi - Policewoman

Jimmy Aubrey
The Hag / Baron Polinka

Theodore Lorch
Daggett - the Butler (as Ted Lorch)
George DeNormand
Pedro - Henchman

Bob Terry
Peyton - Henchman
William Farrel
Count Basil Segaloff
Frank Wayne
Charles - the Footman
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