Gintama Season 4 Episode 11: Battle on Rakuyo Arc: Part 11 - First Student
Episode 11 of 12 of Gintama Season 4, aired March 18, 2017, 25 minutes. Available with English subtitles and dub where released.
Episode summary
As the gang comes to grips with the aftermath of the battle with Kamui, a familiar figure appears before Takasugi and the Kiheitai.