Mordrelle (Suzanne Andrews) is a villainess in the 1997 episode "Miracle at Avalon" for the action adventure TV series "The New Adventures of Robin Hood".
Mordrelle is an evil witch, who was banished from Avalon many years ago. In the episode, she comes to the court of Sir Guy of Gisborne (Greg Porretta) to tell him some incredible news. The God of Healers sent her young daughter Gwyneth (Annoushka Le Galllois) from Avalon, to live amongst mortals many years ago. The beautiful young healer must return home before her twenty-first birthday, or all who have been healed by her hand will die. Unknown to Robin Hood (Matthew Porretta), he was her first healing when he hit his head as a child, an act that was witnessed by his sworn enemy, Sir Guy.
Mordrelle reminds Sir Guy of the incredible opportunity he has if he just prevents Gwynetth from getting home in time. He would be rid of Robin Hood for good.
Robin and Gwyneth meet and he senses there is a connection, prior to her telling him the story. Sir Guy and Mordrelle attempt to capture Gwyneth, and in the scuffle, Friar Tuck (Martyn Ellis) is slashed by Mordrelle's knife. He is mortally injured until Gwyneth heals him.
In the end, Sir Guy is killed in a fight with Robin, and is brought back to life by Gwyneth. As she is walking away, he spots Mordrelle about to kill Gwyneth, which would have resulted in Sir Guy dying all over again. Fortunately for Robin, he pulls out a knife from his boot and flings it in Mordrelle's chest, killing her.