The song that Crackerjack plays for his and Beatrice's stage show, is "I Will Always Think of You," which debuted in The Old Sugarman Place (2017), when he played the song on the piano with their mother, Honey Sugarman.
The way that BoJack's and Herb's sentences run on naturally from one another when talking about questions is reminiscent of their cadence in The Telescope (2014).
Lin-Manuel Miranda appears in this episode. He graduated from Wesleyan University, the school BoJack taught at. He voices the character Crackerjack Sugarman.