Teresa Peschel, author of "Agatha Christie, She Watched" and the "International Agatha Christie, She Watched," discuss "The Secret Adversary," the 1983 TV movie starring Francesca Annis and James Warwick. This is the second TV adaptation the estate permitted, and the future of Christie on the screen hung in the balance. Did they succeed?

Joining Teresa is her husband, technical adviser, and straight man, Bill Peschel. Together, they are Peschel Press, publisher of intriguing, intelligent, and idiosyncratic books.