Hospital Besieged: The Evil Hand Revealed!

is episode 58 of the original Naruto anime.

Synopsis
Baki tells Kankurō and Temari to watch over their brother Gaara. Kankurō and Temari go to Gaara's room and are surprised to find him missing. Naruto has slept for three days, meaning the Chunin finals start the next day. Shikamaru gives Naruto a fruit basket originally intended for Chōji. Sakura goes to Lee's room and replaces the flower. Chōji complains of his hunger, and Ino walks in with a fruit basket for him.

Gaara enters Lee's room and attempts to kill Lee, but Naruto and Shikamaru stop him. Gaara tells them of his past and the monster inside him. Naruto sympathizes, saying he, too, has a monster inside him. Gaara attempts to kill the two of them, but Guy steps in and demands Gaara leave. Gaara leaves, but before doing it, he promises that he'll kill them all.