S05E08 - Nothing Lasts Forever, Including Parents, Money, Youth, Your Room, Dress Shirts, Me, You and the Gintama Anime
Synopsis
Due to a lack of budget, the Yorozuya try to use old footage to make a filler episodes. While Hasegawa first plays a theme song, the characters then watch a fake trailer a supposed second film based on the series. The episode ends with a chapter of "Teach us Ginpachi-sensei", a story in which Gintoki is the teacher from high school class composed of anime's characters.
