Blake of Scotland Yard

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

Jimmy Aubrey

The Hag / Baron Polinka

Theodore Lorch

Daggett - the Butler (as Ted Lorch)

Bob Terry

Peyton - Henchman