In 1952, Agatha Christie's sprawling and intricate new whodunnit, The Mousetrap (based on her radio play, Three Blind Mice), opened in the West End on a very strict condition; no one was to ever give away the plot of the show. To this day, seventy years later, audiences have abided by the rule, ensuring that whether it is your first or 30th time seeing it, the experience and the discovery of "whodunnit" will come as a surprise!