It's the end of an era as Agatha Christie's brilliant and beloved Hercule Poirot investigates his final cases in these five feature-length mysteries. The persnickety sleuth, played to perfection by David Suchet, relies on his "little grey cells" and help from his friends Captain Hastings (Hugh Fraser) and Miss Lemon (Pauline Moran) to solve the most intricate mysteries of the Art Deco era. Guest stars include Iain Glen, Zoë Wanamaker, Patricia Hodge, Helen Baxendale, Aidan McArdle, and Philip Glenister.
While Poirot investigates the murder of a renowned psychiatrist, Ariadne Oliver becomes an amateur sleuth of her own when her goddaughter tasks her to find out the truth about the nature of her parents' mysterious deaths.
As the threat of world war looms large, Poirot seeks the help of friends both old and new when he is pitted against a dangerous group of dissidents responsible for a series of violent murders.
Ariadne Oliver is asked to devise a murder hunt for a Devon fete, but her sense of foreboding summons Poirot to the scene. Her fears are realized when, during the fete, the girl playing her murder victim winds up well and truly murdered.
Poirot's pursuit of an infamous art thief leads him to a snowbound hotel in the Swiss Alps, where he is met with a plethora of mysteries and the reappearance of a familiar face from the past.
An ailing Poirot returns to Styles with Hastings nearly three decades after solving their first mystery together there in order to prevent an unscrupulous and ingenious serial killer from claiming more victims.