In the original Soul Society arc, this episode focuses on the group's attempts to infiltrate the Seireitei after being repelled by Jodanbo at the White Road Gate.

The modern Episode 23 (part of the second cour of Thousand-Year Blood War ) is far more action-heavy, adapting manga chapters 592 through 597. dirksblogposts – Page 6 - Weeb the People

Option 1: Original Series Episode 23 – "14 Days Before Rukia's Execution"