Within the ficitional "Star Wars" universe, Qui-Gon is the second mentor of Obi-Wan Kenobi (after Obi-Wan completed his training with Yoda), and a powerful and wise, yet controversial Jedi Master, who has many uncommon beliefs regarding the Force. In "The Phantom Menace", his mission to protect Queen Padmé Amidala of Naboo leads him to encounter a young Anakin Skywalker, whom he believes to be the prophesied "Chosen One" who will bring balance to the Force. He concludes Anakin must be trained as a Jedi, much to the disapproval of the Council. Qui-Gon later partakes in the Battle of Naboo, where he is mortally wounded in a lightsaber duel by the Sith Lord Darth Maul. In his final moments, he makes Obi-Wan promise that he will train the young Skywalker. "Attack of the Clones" introduces Qui-Gon's former Jedi mentor, Count Dooku, who has fallen to the dark side of the Force and has become a Sith Lord. At the end of "Revenge of the Sith", it is implied that Qui-Gon has learned how to become a Force spirit after death, and has taught Yoda this technique, who in turn informs Obi-Wan how to commune with Qui-Gon through the Force so that he could learn it as well. "The Clone Wars" also explores this idea.