Gintama Episode 110: Everyone Is an Escapee of a Prison Called "Myself"
Episode 110 of 201 of Gintama, aired June 11, 2008, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Katsura is inprisoned, and fellow inmate Suekichi tries to find a way to make Katsura fall asleep so that he can make his escape.