Jordan says that Reilly works at Bannerman Chemicals. In the comics, Bannerman Chemical is the company that Rex Taylor worked at. Jordan also mentions that Reilly works for Firebrand Chemicals. Firebrand is a superhero that dates back to 1941, and a member of the All-Star Squadron and the Freedom Fighters. Firebrand's real name was Rod Reilly, with his father's name being Ed Reilly.
Pat's jokes about Beth's poor eyesight are nods to Beth's comic book counterpart, who was blinded in a chemical explosion at a hospital. Comic-Beth was also saved by Rick Tyler, who was under the effects of Miraclo. Interestingly enough, Beth is saved by Rick later in the episode when he catches her from falling from the roof.
Brec Bassinger revealed in a tweet that the hospital scene was a re-shoot. That in reality, they shot this scene weeks after wrapping the episode
The goggles show the last image they saw of Pat, that being him on the ground reaching out as Dr. Mid-Nite was dragged into the shadows
Nelson Lee was unavailable to shoot the Dr. Ito human-form photo so the crew sent the lab coat to Nelson in Toronto, where he was then photographed by his younger sister.