After more than 9,000 performances in 27 years, “the Toronto production of The Mousetrap will close Jan. 15. Producer Peter Peroff says business has been down about 40 per cent this year, which he attributes to the combination of SARS, the war in Iraq and the Alberta mad-cow scare, all of which have made it difficult to attract the busloads of U.S. tourists upon which the long-running Agatha Christie whodunit relies.”