When Adam dresses up as Spock, he is wearing the red uniform shirt of a Star Fleet engineering officer. He should be wearing a blue uniform shirt, because Spock was a science officer.
Takes place during Halloween in Pennsylvania, yet all the trees are fully green.
When Murray is giving Adam relationship advice, Murray says, "It keeps your mom and I chugging along."
Although very commonly heard in modern American English, this form of hypercorrection (mistakenly using "I" when one should use "me" because one believes it sounds correct even though it's incorrect) was almost nonexistent in the 1980s, especially among working-class people like Murray who grew up in Philadelphia in the 1950s and '60s. Hypercorrection using "I" instead of "me" only became common in the US in the 2000s, and the show's writers probably didn't even realize their mistake.
Although very commonly heard in modern American English, this form of hypercorrection (mistakenly using "I" when one should use "me" because one believes it sounds correct even though it's incorrect) was almost nonexistent in the 1980s, especially among working-class people like Murray who grew up in Philadelphia in the 1950s and '60s. Hypercorrection using "I" instead of "me" only became common in the US in the 2000s, and the show's writers probably didn't even realize their mistake.
When Barry is freaking out about thinking he saw Lainey's ghost, Matt Bradley says, "this is our fault, we tried to use the Ouji to get you over Lainey but instead we just got her into your head". However, during the earlier Ouji scene, Matt Bardley wasn't even there. It was just Naked Rob, Geoff, Barry and Andy.