The Riddle of the Sphinx (Inside No. 9) was characterised by Pemberton as a thriller in the style of Anthony Shaffer's 1970 play "Sleuth", while Shearsmith identified the episode as particularly theatrical, in the style of "Sleuth" and Ira Levin's 1978 play "Deathtrap". BBC executives, according to Shearsmith, saw the episode as a cross between "Sleuth" and Willy Russell's 1980 play "Educating Rita" that read as if it had been authored by psychopaths. The executive producer Jon Plowman suggested that the first half of the episode plays out like a radio play. The word-play and tea-drinking in this part of the episode are, in the writers' opinion, very
Harley Valentine L-Tower residence. For Valentine, being awarded this commission was "nothing if not a career-defining project for an artist not yet out of his 20s." The project consists of a triptych designed in homage to the National Ballet of Canada's four-decade residence at the site; the three sculptures depict abstracted ballet dancers in various dynamic positions In February 2013, Valentine unveiled his controversial sculpture "The North Pole", which plays on themes of aboriginal art and global warming, at the De Luca Fine Arts gallery. For it, Valentine cast in bronze a seven-foot, 100-year-old narwhal tusk. Drawing on a desire to bring