James mentions an alien protest like National City's in Gotham. Kara visited Earth-1's version of Gotham City in the Arrow (2012) leg of the "Elseworlds" crossover.
Stealers Wheel's "Stuck in the Middle with You", which plays over the opening scene, is perhaps most famous for its appearance in Quentin Tarantino's Reservoir Dogs (1992), when Mr. Blonde (Michael Madsen) tortures a police officer.