Blake of Scotland Yard

Ralph Byrd

as

Dr. Jerry Shee...

Herbert Rawlin...

as

Sir James Blake

Joan Barclay

as

Hope Mason

Lloyd Hughes

as

Dr. Marshall, ...

Dickie Jones

as

Bobby Mason

Lucille Lund

as

Duchess

Nick Stuart

as

Julot

Sam Flint

as

Chief Insp. He...

Gail Newbury

as

Mimi the Polic...

Jimmy Aubrey

as

The Hag / Baro...

Theodore Lorch

as

Daggett, the B...

George DeNorma...

as

Henchman Pedro

Bob Terry

as

Henchman Peyton

William Farrel

as

Count Basil Se...

Frank Wayne

as

Charles, the F...