Coniine is the poison used to kill Amyas Crale in Five Little Pigs (published in 1943), also known as Murder in Retrospect, one of Agatha Christie's Hercule Poirot mysteries.
Agatha Christie used Enquire Within About Everything as an important clue in the Hercule Poirot detective novel, Hallowe'en Party.
The show is given its own segment on Today with Pat Kenny the morning before broadcast, with Boucher-Hayes presenting the evidence in a style that has been compared to a "scene where Hercule Poirot explains the whole thing to an assembly of slow-witted guests in the drawing room".
The book features the recurring character of Colonel Race for the last time and was an expansion of a Hercule Poirot short story entitled "Yellow Iris," which had previously been published in issue 559 of the Strand Magazine in July 1937 and in book form in The Regatta Mystery and Other Stories in the US in 1939.
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Mrs. Barbara Franklin was poisoned by the Calabar bean in Curtain, the last novel both for the author Agatha Christie and her fictional detective Hercule Poirot.
Also the phrase was used twice by the character Daphne Castle played by Maggie Smith in the 1982 film adaptation of Agatha Christie's 'Evil Under The Sun' whilst advising Hercule Poirot which of her hotel guests to question regarding the murder of Arlena Stewart.
He has also written for 'straight' television drama, contributing episodes to ITV's famous adaptations of Agatha Christie's Hercule Poirot mysteries, starring David Suchet.
Christie first described a village of that name prior to the introduction of Jane Marple, in the Hercule Poirot novel The Mystery of the Blue Train, in which it was home to that book's protagonist Katherine Grey.
The station building appears as "Marble Hill" underground station in the episode "Wasps' Nest" of the Agatha Christie's Poirot TV series with David Suchet as Hercule Poirot.
ITV adapted the story into a television programme in the series Agatha Christie's Poirot starring David Suchet as Hercule Poirot and Zoë Wanamaker as Ariadne Oliver, which aired in the US on A&E Network in December 2005 and, in the UK, on ITV1 in March 2006.
After considering in isolation And Death Came Too, Mr. Ashley turned his attention to Murder is Easy and started, "Mrs Christie has abandoned M. Hercule Poirot in her new novel, but it must be confessed that his understudy, Luke Fitzwilliam, a retired policeman from the Mayang States is singularly lacking in 'little grey matter.' Poirot may have recently become, with advancing years, a trifle staid, but absence makes the heart grow fonder of him."