Final answer:
The first episode of Attack on Titan Season 4 Part 2 is titled 'Judgment', and it is the 76th episode in the series.
Step-by-step explanation:
The first episode of Attack on Titan Season 4 Part 2 is titled 'Judgment' or 'Shihai' in Japanese. It is the 76th episode of the overall series and directly continues the story from where the first part of Season 4 ended. The episode was highly anticipated and aired on January 9, 2022. It sets the stage for the climactic finale of the Attack on Titan series.