Encore Theatre Presents: A Poirot Double Bill Production! Poirot Double Bill is an Agatha Christie production with double the entertainment, two short productions, The Wasp's Nest & Yellow Iris. In The Wasp's Nest, Hercule Poirots come between a bitter triangle of lovers to prevent a sinister murder before it takes place. In Yellow Iris, A distressed phone call from a mystery woman brings Hercule Poirot to the hotel Jardin des Cygnes, where a man commemorates the four-year anniversary of his wife’s sudden death – a death under very suspicious circumstances that Poirot himself witnessed. Gathered is everyone present on that fateful night and now Poirot must find a killer in the midst, before they strike again.