By a strange quirk of fate, Basil Dearden was actually killed in a car crash on the same stretch of road where, a couple of years before, he had filmed the death of the character, Harold Pelham, in a car crash in the film L'uomo che uccise se stesso (1970) starring Roger Moore. This was stated by Roger Moore himself in the 'Special Features' section of the DVD 'The Man Who Haunted Himself'.