British actor Robert Powell who plays Poirot who stars in Agatha Christie's first ever play, Black Coffee, centre, poses alongside Liza Goddard, as Miss Caroline Amory, and Robin McCallum, right, as Poirot's friend and confidante Captain Arthur Hastings, during a photo call outside the west London residence of author Christie, in Cresswell Place, London, . The play opens a UK wide tour in Windsor this week, and was the only one to ever feature the Belgian detective