Teresa Peschel, author of "Agatha Christie, She Watched" and the "International Agatha Christie, She Watched," discuss "The Secret of Chimneys," the 2010 episode of "Agatha Christie's Marple" starring Julia McKenzie.Joining Teresa is her husband, technical adviser, and straight man, Bill Peschel. Together, they are Peschel Press, publisher of intriguing, intelligent, and idiosyncratic books.