Hercule Poirot sort of obsessive-compulsive" in Poirot. As mentioned in "Curtain" and "The Clocks", he is fond of classical music, particularly Mozart and Bach. In "The Mysterious Affair at Styles", Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in "The Big Four". In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels,
Hercule Poirot the Poirot stories also appeared, most recently twenty-seven of them on BBC Radio 4 (and regularly repeated on BBC 7, later BBC Radio 4 Extra), starring John Moffatt; Maurice Denham and Peter Sallis have also played Poirot on BBC Radio 4 in "The Mystery of the Blue Train" and in "Hercule Poirot's Christmas", respectively. In 1939, Orson Welles and the Mercury Players dramatised "Roger Ackroyd" on CBS's "Campbell Playhouse". A 1945 radio series of at least 13 original half-hour episodes (none of which apparently adapt any Christie stories) transferred Poirot from London to New York and starred character actor Harold