Nygma continuously refers to Lucius as "Foxy." In the comics, he refers to Batman as "Batsy."
The ringtone on Edward's phone is the same as the opening notes of the Batman (1966) theme music.
This episode marks the start of 'Heroes Rise'.
The cabin that Jim Gordon stays at with his uncle is the same cabin that Don Maroni took Penguin to in Season 1, Episode 14.
Donal Logue previously starred in Blade, and like in Gotham, the morgue and hospital staff do not wear hair nets or masks when examining dead bodies.