Scotland Yard detectives hunt for a dangerous criminal who has recently returned to England.
Patric Curwen
Dr. Lomond
Esmond Knight
John Lenley
John Longden
Inspector Wembury
Carol Goodner
Cora Ann Milton
Gordon Harker
Samuel Hackett
Franklin Dyall
Maurice Meister
Dorothy Bartlam
Mary Lenley
Henry Hallatt
Inspector Bliss
Arthur Stratton
Sgt. Carter
Kathleen Joyce
Gwenda Milton
Eric Stanley
Commissioner
Angus MacPhail
Writer
Bryan Edgar Wallace
Production Manager
Walter Forde
Director
Sidney Gilliat
Additional Dialogue
Harold V. King
Sound
Edgar Wallace
Novel
Leslie Rowson
Director of Photography
Rosaire Rutland
Continuity
Alex Bryce
Ian Dalrymple
Editor
Norman G. Arnold
Set Designer
Robert Stevenson
Michael Balcon
Producer
