Dead Man's Folly is a 1986 British-American made-for-television mystery film featuring Agatha Christie's Belgian detective Hercule Poirot.

The cast included Jean Stapleton, Tim Pigott-Smith, Jonathan Cecil, Constance Cummings and Nicollette Sheridan.

Hercule Poirot and his associate, Captain Hastings, are called in by his eccentric mystery author friend, Ariadne Oliver, to a manor house in Devon.

Oliver is organizing a "Murder Hunt" game for a local fair to be held at Nass House, but she is troubled by something she cannot quite put her finger on.

Another screen adaption of one of Christie's novels in 1988, Appointment with Death, marked Ustinov's final portrayal of the Belgian detective.