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
