Naruto Episode 142: "The Three Villains from the Maximum Security Prison"

This episode marks the beginning of the Mizuki Tracking Mission , an anime-only filler arc that brings back Naruto's first major antagonist, Mizuki.

: Following the Land of Rice Fields mission, Naruto is eager to begin his three-year training with Jiraiya. However, Jiraiya is sent on a sudden information-gathering mission by Lady Tsunade, leaving Naruto with a training scroll instead.

: Naruto discovers a prison break at Konoha’s Correctional Facility orchestrated by Mizuki. Mizuki escapes alongside the "Legendary Stupid Brothers," Fūjin and Raijin—two massive inmates with superhuman strength.