The 10th season of the Bleach anime series is named Arrancar vs. Shinigami arc. They are based on Tite Kubo's Bleach manga series, and adapt the 32nd through 36th volumes of the manga over 19 episodes. The episodes' plot continues to follow Ichigo Kurosaki's and his friends' battle against the Espada, the strongest members of former Soul Reaper captain Sōsuke Aizen's army, to rescue Orihime Inoue. Episodes 204 and 205 are filler episodes bringing back the Kasumiōji Soul Reapers from Season 9, and features a soccer game. Episode 206 onwards returns to the manga storyline with the flashback arc 'Turn Back The Pendulum'. The last two episodes of the arc are filler, following the events back in Karakura Town after Ichigo and his crew went to Hueco Mundo.
Episode S10E17 (206):
The pendulum of time swings back 110 years to reveal secrets that need to be shown before time can advance again. In the Soul Society, the then-fifth division captain, Hirako Shinji, is approached by then-fifth division lieutenant, Aizen Sosuke, about preparations for the new captain of 12th division. Yoruichi Shihoin and Kisuke Urahara are sparring in their private training area until Yoruichi tells him that she has recommended him for the position of 12th Division Captain. Soi Fon, immediately distrusting Urahara because of what she has seen of his person and his dwelling, follows him around town in order to prove to Yoruichi that he is not worth being chosen for that responsibility. Yoruichi, however, after seeing Soi Fon's proof on paper, disregards it as a love letter. It turns out that Urahara and a group of Shinigami were tailing a group of deserters who had abandoned the Seireitei of their own admonition and sent to stop them. After they are taken care of, Urahara passes the qualification exam and shows up, albeit last and late, to the captain's meeting.