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

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

Dick Curtis

Nicky

Basil Dickey

Screenplay

Robert F. Hill

Director

Holbrook N. Todd

Editor

Robert Stillman

Supervisor of Production Resources

Fred Bain

Editor

Fred Preble

Settings

Ed W. Rote

Production Manager

William Buchanan

Screenplay

Rock Hawkey

Original Story

Bill Hyer

Director of Photography

Hans Weerin

Recording Supervision