Sundays, June 21-July 26, 9-10:30 pm ET
David Suchet returns to his signature role as suave Belgian supersleuth Hercule Poirot in two new mysteries based on the novels by Agatha Christie. ("Poirot"; 6/21-28)

Acclaimed British actress Julia McKenzie (“Cranford”) takes over the iconic role of Miss Marple in four new episodes. (“Miss Marple, Series IV”; 7/5-26)

David Suchet ("Henry VIII," "The Way We Live Now") returns to his signature role as suave Belgian supersleuth Hercule Poirot in two new mysteries based on the novels by Agatha Christie. On holiday abroad, taking a countryside break or simply going about his business near his central London home, Poirot finds himself exercising his "little grey cells" by helping police investigate crimes and murders - whether they ask for his help or not.