[ul]
[li]Alan Willis - IIRC, played by a white actor with curly hair. (can’t get the name, IMDb is down.) Gave me the impression that an interracial couple’s children can be of either color. Truth is that they just are more coffee-and-cream colored.[/li]
I believe he was much older, so he was on his own. Maybe he lived in a different city, hence the guest appearance status.
[li]Denise Huxtable - She started as the core of “A Differnt World”, which is part of why she left “The Cosby Show”. But the other characters soon were more popular.[/li]
Lisa Bonet wanted to get into movies too, hence her eventual departure from both shows.
[li]Judy Winslow - So that was her name. I always saw the actress in the credits until a certain point, but I couldn’t for the life of me remember any significant plot involving her. I guess Urkel swamped her part.[/li]
[li]Chuck Cunningham - aforementioned basketball scholarship to Outer Mongolia. :D[/li]
[li]Jill Greene - IIRC, she just appeared last season. Give her time, she may re-appear.[/li]
There have been lots of family cameos, but only the Gellers (Elliot Gould and Christina Pickles) are regular guests. Morgan Fairchild is Chandler’s mom (can we say Oedipus?), and Teri Garr is Phoebe’s true mom.
[li]Cousin Oliver - He appeared in (I think) two episodes, one of which was the last one made (about the hair tonic that turns hair orange :rolleyes:). So he disappeared when the show did.[/li]
Robbie Rist went on to a Saturday morning show, “Big John, Little John”, about a teacher who drank from the fountain of youth, and keeps morphing from his older self (played by the same guy who played Bea Arthur’s ex-husband on “Golden Girls”) to his 12-year-old self, played by Rist. He also premiered the role of Dr. Z on “Galactica 1980”.
[li]Seven Bundy - It quickly became clear that the fans were not happy with the new direction or the new character. The writers at first wrote fewer lines for him, and then wrote him out altogether. His disappearance was never explained in the show, although “Rock Of Ages” (NOT his last show) hints at an explanation.[/li]
Also Peg’s pregnancy the prior season was written out. The actress that played her, Katie Segal, was pregnant, but lost her child. She was willing to continue with the story line, but the producers decided against it. Her and Marcy’s pregnancies were explained as “dream episodes”.
[li]Avery Brown - Dunno. Quit watching after Murphy gave birth.[/li][/ul]