Bleach Episode 64 -

: As the title suggests, Renji Abarai arrives in the human world dressed in 1970s-style civilian clothing to monitor the situation, leading to comedic interactions with the main cast.

: This episode introduces the Modified Souls (Ririn, Kurōdo, and Noba) who serve as both antagonists in this episode and eventually as allies throughout the anime-only content. Bleach Episode 64

: This episode and the subsequent arc are filler and do not appear in the original manga. The last canon chapter before this episode is Chapter 182. Episode Features & Trivia : As the title suggests, Renji Abarai arrives

For more information on whether to watch or skip this segment, you can check the Bleach Filler Guide on HowStuffWorks or the Bount Arc breakdown at Radio Times. : As the title suggests