The secret is exposed online
By Noam Cohen | New York Times | Updated: 2010-10-17 10:03

The surprise ending of “The Mousetrap” had been largely kept secret for decades until Wikipedia revealed it. Mousetrap Productions |
After 58 continuous years of performances in London, the surprise ending of the Agatha Christie play "TheMousetrap" has been largely preserved by the estimated 10 million people who have seen the play.
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