Mordred was once a Knights of the Round Table. He was also Arthur's stepbrother. He eventually betrayed King Arthur and his fellow knights. He planed to rule over Camelot, but his plan was stopped by Arthur and Merlin.
Centuries later Mordred was reincarnated and destroy him the reincarnated Arthur before he could realize a prophecy that he would bring a new golden age.
- In the original novel, Marco was revealed to be the reincarnation of Mordred. This was changed to Mr. Moore (Mr. Morton on the novel) when the story was adapted to film.