The name Michael Guggenheim is seen on Victor Zsasz's list of contacts, a reference to Marc Guggenheim, series executive producer.
The False Face Society are referenced in this episode and one of their members makes a brief appearance. Towards the end of the episode, two Crows agents discuss a photo of "some dude in a black mask" who is believed to be the head of the society. This is a reference to Black Mask/Roman Sionis, a prominent enemy of Batman's and the leader of the False Face Society.
Fourth live action appearance of Victor Zsasz, after Batman Begins (2005), Gotham (2014), and Birds of Prey (2020). It's also the second live action appearance of him with the word 'Bat' in the title.