In the series finale, as Kimmy approaches Jacqueline, she states "Look, my home is gonna get tooken from me if I don't do something." The word 'tooken' is a reference to the original name of the series before 'Unbreakable Kimmy Scmidt' was decided.
In the pilot, Kimmy and Titus sing "Circle of Life" from The Lion King (1994) on Times Square where Titus works as an Iron Man impersonator, in order to make ends meet. In this last episode of the show, Titus sings the song as part of the cast of the Broadway musical version, signifying that he has become a star finally.
Dylan Gelula (Xanthippe) wore a brown wig for this episode because she had dyed her hair blonde.
At the 26:40 mark, Lillian comes up from the smoking basement apartment and declares, "I'm alive, dammit!" This is a cheeky throwback to the lyrics of the show's theme song where Walter (Mike Britt) sings, "It's a miracle! They alive, dammit!" as Kimmy and the Mole Women emerge from the bunker.
Paul Walter Hauser's character was casted in the MCU the year before Hauser was casted in The Fantastic Four: First Steps (2025).