the Georgian era. References in other works The Double Clue, first published in 1923, features the first of three appearances of the character of Countess Vera Rossakoff. Her other two appearances were in the series of stories in The Sketch magazine in early 1924 that eventually made up the contents of The Big Four (1927) and in The Capture of Cerberus, the final story of The Labours of Hercules (1947). Poirot's admiration of the lady mirrors that of Conan Doyle's Sherlock Holmes for Irene Adler as described in A Scandal in Bohemia (1891). The Double Clue also features the use of the Cyrillic alphabet as a deception, a trick that Christie reused in Murder on the Orient Express (1934). The plot set-up contained in The Market Basing Mystery of a suicide being made to look like murder to trap a blackmailer was expanded by Christie into the novella-length story Murder in the Mews published in the collection of the same name in 1937. It also bears resemblance to Conan Doyle's The Problem of Thor Bridge, solved by Sherlock Holmes. The plot set-up contained in How Does Your Garden Grow? of a vague letter for assistance from a woman who soon dies was expanded by Christie into the full-length 1937 novel Dumb Witness. The Chocolate Box case is mentioned in the novel Peril at End House (1932) in chapter 15, when Poirot tells Commander Challenger that he indeed had failures in the past. The Submarine Plans published in 1923 has the same plot as "The Incredible Theft" published in 1937 The protagonist in Margaret Atwood's "Giving Birth" reads Poirot's Early Cases while in labour. Film, television or theatrical adaptations Early television play Wasp's Nest was the very first Agatha Christie story to be adapted for television with a live transmission taking place on 18 June 1937. Agatha Christie adapted it, and transmission was restricted to a small area in and around London. British television series All the stories in the collection have been adapted for episodes in the ITV series Agatha Christie's Poirot with David Suchet in the role of Poirot, Hugh Fraser as Hastings, Philip Jackson as Japp and Pauline Moran as Miss Lemon. Fifteen stories were directly adapted, while one story was merged into another episode, and two stories were reworked by the author, with new titles, which were then adapted for television in the series. Fifteen adaptations (in