Naruto Episode 30
Sasuke and the Grass ninja engage in combat. After a protracted battle, Sasuke sends a blast of fire to the ninja’s face. However, the ninja awakens with his face partially melted off, revealing another face underneath. Extending his neck, he bites Sasuke and leaves behind a cursed seal. The ninja reveals himself to be Orochimaru, and leaves. Anko finds Orochimaru, her former teacher, and unsuccessfully tries to kill him.
Source: Wikipedia
Naruto Episode 30 – The Sharingan Revived: Dragon Flame Jutsu!
