The title to the episode refers to the 73rd issue of More Fun Comics. Which came out on 11-19-41. And it is also the debut issue of Green Arrow.
The prosecutor in Oliver's trial, Alexa van Owen is said to have taken down Intergang and Bruno Manheim. In the comics, Intergang is a criminal organisation run by Bruno Manheim, who have been known to use weapons from the planet Apokolips, home to Darkseid. They are primarily an enemy of Superman and later Batwoman.
Two actors in this episode also played important roles in MARVEL TV series. Catherine Dent (Alexa Van Owen) is playing General Hale in Marvel Agents of SHIELD while Wil Travel (Christopher Chance) has played Will Simpson in Marvel Jessica Jones.
Alexa Van Owen may be a nod to another famous TV lawyer, Grace Van Owen, from the 1980's TV series LA Law.