Satterthwaite to contemplate that they could have been the victims to the poison cocktail, at Sir Charles' party. References External links Three Act Tragedy at the official Agatha Christie website Three Act Tragedy at new official Agatha Christie website Hercule Poirot novels 1934 British novels Works originally published in The Saturday Evening Post Novels first published in serial form Dodd, Mead & Co. books British novels adapted into films British novels adapted into television shows Novels about actors Novels set in Cornwall Novels set in Monaco Novels set in Yorkshire