Joel tells Susie she dresses like a Katzenjammer kid. The Katzenjammer Kids was a comic strip created by Rudolph Dirks for King Features Syndicate and was highly popular. The kids all wore hats like Susie's.
At the industrial expo, Susie says to Midge, "Fine, so you won't win a Tony." Season 5 wrapped in 2022, and Rachel Brosnahan then starred in "The Sign In Sidney Brustein's Window" on Broadway. In what was considered a snub by most theater critics, Rachel Brosnahan was not nominated for a Tony in 2023.