I just remembered that Gail Edwards (Dot) later appeared (http://nostalgiarush.blogspot.com/2020/11/five-actors-who-appeared-in-two-shows.html) on Blossom as Six's mom. Incidentally, Barrie Youngfellow was originally in line to play Blossom's mom in the initial pilot (https://blossompedia.fandom.com/wiki/Pilot) for the show. Marian Mercer (Nancy) later guest starred (https://en.wikipedia.org/wiki/Marian_Mercer#Television) on The Golden Girls (https://goldengirls.fandom.com/wiki/Sisters_and_Other_Strangers) and its sister show, Empty Nest. Richard Stahl (https://en.wikipedia.org/wiki/Richard_Stahl#Career) (Howard) also guest starred (https://www.imdb.com/name/nm0821489/) on The Golden Girls and Empty Nest.