Ralph Richardson
— David Preston
Margaret Leighton
— Janet Preston
Campbell Singer
— Inspector Hemingway
Jack Hawkins
— Dr. Sparling
Michael Shepley
— Major Watson
Frederick Piper
— Solicitor Petheridge
Meriel Forbes
— Peggy Dobson
Margaret Withers
— Mrs. Watson
Gerald Case
— Sergeant Evans
Diana Beaumont
— Ellen
Archie Duncan
— Station Sergeant (uncredited)
Johnnie Schofield
— Joe Dobson (uncredited)