One of the songs heard is Bob Marley's Redemption Song. Stephen Marley, who made an appearance as a musician in On and On (2018), is Marley's son.
"They Reminisce Over You (T.R.O.Y.)" is a song from the album "Mecca And The Soul Brother" of the hip-hop duo Pete Rock & C.L. Smooth.
This is the final episode of the series.
The apartment that Luke confronts Rosalie Carbone in is the same one used as the temporary headquarters of fsociety in the beginning of season 2 of Mr. Robot.