1972: Mousetrap theatregoers asked 'whodunit'
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In this segment from a longer programme, a reporter asks theatregoers coming out of the 8,320th performance of the Mousetrap why they think the play has been so successful. The importance of never revealing "whodunit" is suggested by the unexpected conclusion to his investigation.
The Ambassadors, as it was originally known, and St Martin's Theatre were conceived by their architect, WGR Sprague, as companions. Building work started in 1913, but World War One interrupted the construction of the latter for three years.
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