The Latin on the Graduation Podium "Veritas et Mendicam" means "Truth and Begging."
Rabbi Krustofsky appears as a hologram, voiced by the late Jackie Mason. His line is archive audio from Clown in the Dumps (2014).
Drew Barrymore doesn't reprise her role as the voice of Sophie the daughter of Krusty in this episode. She is replaced by Natasha Lyonne as the voice of Sophie.