For PattyR...
The Mousetrap is a murder mystery play by Agatha Christie. The Mousetrap opened in the West End of London in 1952, and has been running continuously since then. It has the longest initial run of any play in history, with over 24,000 performances so far. It is the longest running show (of any type) of the modern era. The play is also known for its twist ending, which at the end of every performance the audience is asked not to reveal.
Blue plaque on the front wall of St Martin's Theatre, Covent Garden, London
22461st performance (St Martin's Theatre - November 2006)
Christie herself did not expect it to run for such a long time. In her autobiography, she reports a conversation that she had with Peter Saunders: "Fourteen months I am going to give it", says Saunders. To which Christie replies, "It won't run that long. Eight months perhaps. Yes, I think eight months."
Congratulations PattyR!