The word "un-birthday" is a term used in Lewis Carroll's novel 'Through the Looking-Glass', the sequel to 'Alice's Adventures in Wonderland'. An un-birthday is any day in the calendar except for one's birthday. It gave rise to "The Unbirthday Song" in the 1951 Disney animated feature film Alice in Wonderland (1951), where it was popularized.
The video that Mouse makes, demanding that they release Alice before 9 o'clock, is similar to the video Joker does in The Dark Knight (2008) threatening to kill people every night if Batman doesn't turn himself in.
In the comics, Police Interim Commissioner Jack Forbes was a corrupt police officer who was given the role of Commissioner when Carmine Falcone returned.
August Cartwright is meant to embody the character of The Caterpillar, given the incredible resemblance between his bizarre metallic surgical mask and pipe to the illustration of The Caterpillar in the copy of 'Alice's Adventures in Wonderland' that Beth just so happens to be reading at the time.
In some cities, this episode was postponed to air on February 2, 2020, due to news coverage regarding the death of Kobe Bryant.