Agatha Christie's Marple (or simply Marple) is a British ITV television programme loosely based on the books and short stories by British crime novelist Agatha Christie. The title character was played by Geraldine McEwan from the first to the third series, until her retirement from the role, and by Julia McKenzie from the fourth series onwards. Unlike the counterpart TV series Agatha Christie's Poirot, the show took many liberties with Christie’s works, most notably adding Miss Marple’s character to the adaptations of novels in which she never appeared. Following the conclusion of the sixth series, the BBC acquired the rights for the production of Agatha Christie adaptations, suggesting that ITV would be unable to make a seventh series of Marple.