In "Once Bitten", Archer—coming out of a hallucination—appears to claim that his father is Buck Henry. In a meta sense, he's right, seeing as Buck Henry co-created the ur-spy-comedy Get Smart. —Wack'd
In "Legs", Krieger says "Me too!" to Ray's "I piss and shit in a bag". It's a lot less weird when you remember that Krieger's apartment has a communal bathroom that's a literal shithole and going in a bag is probably safer and more sanitary.
In Season 1, the "M, as in Mancy" line is funny, but how the hell did Lana not intervene on that one? She didn't have any static to interfere with her hearing.
Some Fridge Horror. Seamus, as a baby. He already has an implied addiction to alcohol, has a prostitute for a mother, doesn`t know who his father is, has a tattoo of a man who frequently had sex with his mother on his shoulder (Of whom he can`t be sure is his real father or not) before the age of one. This kid doesn`t have a great start to a happy life already