If you are looking for a musical "piece" (a cover song) played during an episode 4:

This episode recently aired (April 20226) and has been a major topic of discussion for its "filler" content and the "King of Hell" storyline.

For a deep dive into the Easter eggs and the ending, Decider provides a comprehensive recap.

You might be thinking of a "piece" like Jaukeem Fortson’s cover of "Easy On Me" by Adele.