Linda Purl had previously played Richie's gum-chewing girlfriend Gloria in the first season of the series.
The first appearance of Clarence the cook who's worked there for years but was never seen.
Rita Wilson is married to Tom Hanks who would later make an appearance in the Happy Days episode A Little Case of Revenge .
Heather O'Rourke is added to the cast, fresh off starring in Poltergeist earlier in the year (1982).
After Potsie kisses Fonzie, a look of disgust can be seen on the face of unknown guy standing behind Potsie. The unknown guy can be seen to mouth the word "yuck"