The London production of Agatha Christie’s The Mousetrap celebrates its 50th anniversary onstage with a performance for Queen Elizabeth (also celebrating her 50th year in production). “Christie’s famous whodunnit is the first stage production to achieve the milestone of half a century, opened on 25 November, 1952. More than 10 million people have seen the classic since it opened and the play has been performed in more than 40 countries and been translated into over 20 languages.”