Agatha Christie's Poirot - Season 3 - Eps 6: The Tragedy at Marsdon Manor
Poirot is summoned to Marsdon by the owner of a country inn there to solve a murder. But the inn-keeper is a would-be thriller writer, and to Poirot's dismay the murder turns out to be fictional. Thankfully, though, there is soon a real (if seemingly supernatural) murder at the big house. Things get even more interesting when a young wife claims that a tree in her garden is haunted by a laughing ghost, and there are also signs of black magic from East Africa. Poirot lays a clever ambush to smoke out the killer,confident that he or she will turn out to be human.
About Agatha Christie's Poirot

Title: Agatha Christie's Poirot
First Air Date: 1989-01-08
Last Air Date: 2013-11-13
Status: Ended
Rating: 8.144/10 (from 492 votes)
Language: EN
Seasons: 14
Total Episodes: 70
Network: ITV1
Genres: Crime, Drama, Mystery
Production Companies: The Computer Film Company, Picture Partnership Productions, Carnival Films, LWT, GBH, A+E Studios, Agatha Christie Limited, Masterpiece, Granada Productions
Synopsis
From England to Egypt, accompanied by his elegant and trustworthy sidekicks, the intelligent yet eccentrically-refined Belgian detective Hercule Poirot pits his wits against a collection of first class deceptions.
Cast

David Suchet
Hercule Poirot