Naruto: Season 1, Episode 49

1 - 49: Lee's Hidden Strength: Forbidden Secret Jutsu!

As the battle between Lee and Gaara continues, Gai remembers how hard Lee used to train and how Lee has pretty much no ninjutsu or genjutsu skills. Lee is also a dropout, like Naruto. In order to defeat Gaara, Lee will have to use the move Gai forbade him to use.