The Capture of Cerberus
One of Poirot's labours - his old love interest, Countess Vera Rossakoff, leads him to a nightclub called Hell and a hidden drug ring. From The Labours of Hercules.
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Two people passing in opposite directions on an Underground escalator. Nothing unusual in that except that these two are Hercule Poirot and Countess Vera Rossakoff – Poirot’s great love from many years before. The Countess, a cunning criminal herself, leads Poirot to a nightclub called Hell, where he observes a secret drug ring.
Published in 1947 in the US in The Week as Meet Me in Hell. The Capture of Cerberus was rejected by the UK magazines and Agatha Christie rewrote it for the 1947 book collection, The Labours of Hercules. The original version was only discovered in 2009 by John Curran (see Agatha Christie’s Secret Notebooks). The Labours of Hercules was included in the final series of Agatha Christie's Poirot, adapted in 2013.