Assuming the man is the victim of a hit-and-run, he stops to offer assistance, only to be coshed and left stunned while his wallet and car are stolen.

Sherwin regains consciousness, but is suffering from complete amnesia with no idea of his own identity or how he came to be found in Yorkshire.

The police investigate missing persons reports but find no case to match Sherwin's age and physical description.

Some days later Sherwin is on the mend, and happens to find in his overcoat pocket a ticket stub from a theatre in Epping, a town some distance away.

Christine attempts to drug him into a deep sleep, but he follows her to the funeral of the car crash victim, where she meets his best friend, Paul, at the burial of the supposed Sherwin.

Gradually, he finds out that Christine and Paul had been intending to sell the house and cash all his assets, and his inconvenient reappearance has derailed their plans.

The Monthly Film Bulletin wrote: "Coincidence seems to play a great and obvious part in the whole affair.