When was miss marple's last on screen performance?

Miss Marple is a character, not an actress. She has been played at various times by Margaret Rutherford, Angela Lansbury, Joan Hickson, Geraldine McEwen and Julia McKenzie. Of these, Joan Hickson came closest to capturing the character as written by Agatha Christie. But who knows? Another actress may come along who will play the part even better. In any case, we can be sure that we have not yet seen the last screen appearance of the durable Christie character.