Happy Days Season 7 episode 165 "A Potsie is Born" aired on 11-Mar-1980 and features: Gail Edwards, Ron Howard, Henry Winkler, Marion Ross, Anson Williams, Don Most, Erin Moran, Scott Baio, and Al Molinaro.
. Dear lord, she was adorable (and STILL IS !!)........reminds me of falling COMPLETELY in love with the woman, after first seeing her on the season 10 M*A*S*H episode, "That's Show Biz" (1981): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-lVBERKltv5c.html .