Gintama Season 3 Episode 51: Farewell Shinsengumi Arc Part Nine: Farewell Shinsengumi
Episode 51 of 51 of Gintama Season 3, aired March 29, 2016, 25 minutes. Available with English subtitles and dub where released.
Episode summary
The complete fallout of the events at Kokujo Island come to light and brings about farewells nobody thought they'd ever see.