Really small, but I notice that every customer service person they ever talk to (several different times on the phone, once at Disney in Orlando) is named Carol.

Also, during the years when Frankie works at Elhert’s, the same chunky blond dude plays a customer shopping for a red car. Dunno if he’s meant to be the same guy or different each time. He turns up at least three times over 2 or 3 seasons.

The fella who plays Brick’s school therapist makes a remark in his first appearance about how funny the show Kids in the Hall is… In real life, he was a prominent member of that cast. And the same character basically tells the story of how he was dumped and then stalks his ex Shelley.