Characters played by Ralph Richardson
David Preston
Characters played by Margaret Leighton
Janet Preston
Characters played by Jack Hawkins
Dr. Sparling
Characters played by Campbell Singer
Inspector Hemingway
Characters played by Michael Shepley
Major Watson
Characters played by Margaret Withers
Mrs. Watson
Characters played by Frederick Piper
Mr. Petherbridge
Characters played by Meriel Forbes
Peggy Dobson
Characters played by Gerald Case
Sergeant Evans
Characters played by Diana Beaumont
Ellen
Characters played by Archie Duncan
Station Sergeant
Characters played by Victor Hagan
Police Photographer
Characters played by Robert Moore
Fingerprint Man
Characters played by Johnnie Schofield
Joe Dobson
Landlord of the Feathers