"The Beast Within" (野獣炸裂!弾けろ吹っ飛べ突き抜けろ!, Yajū Sakuretsu! Hajikero Futtobe Tsukinukero!) is episode 124 of the original Naruto anime.
In his drunken form, Lee's movements are unpredictable and Kimimaro is left unable to dodge his rapid attacks. As Lee begins gaining the advantage in the fight, Kimimaro is forced to use his more powerful abilities. Lee, however, begins to sober up, and reverts to his previous state, easily being outclassed by Kimimaro. Kimimaro prepares to finish Lee off. Meanwhile, Tayuya starts fighting Shikamaru's shadow, and Sakon and Ukon find Kiba and Akamaru. Before any of the Sound Four members can attack the Konoha ninja, Gaara, Temari, and Kankurō arrive at each battle site to take care of the Sound Four members themselves.