Rosario did not appear in the original 40 minute episode, but appears in Part 2 of the syndicated version.
In this episode we find out that Karen's full name is Karen Delaney St. Croix Popeil Walker.
Joel McHale also appeared as Filthy Phil in season 3 of the revival as a con man scamming Karen
When Will asks Tina if she's from "Tempe" and she responds "About 110 degrees in the summer," this is likely a reference to "110 Degrees in the Shade," a musical based on "The Rainmaker," in which Lesley Ann Warren made her Broadway debut in 1963 at 17.