An Eight is Enough Wedding (1989)

Synopsis
Having racked up excellent ratings for the 1987 TV movie Eight is Enough: A Family Reunion, the producers concocted yet another "retro" film, 1989's An Eight is Enough Wedding. Dick Van Patten returns as Tom Bradford, who anxiously prepares for the wedding of his oldest son David (Grant Goodeve). While most of the original cast shows up for the nuptials, Tom's wife Abby is played by Sandy Faison. She replaces Family Reunion's Mary Frann, who in turn had replaced the original Abby, Betty Buckley. Dick Van Patten's real-life wife and son Pat and Jimmy also show up in supporting roles. Like Family Reunion, An Eight is Enough Wedding was telecast opposite the World Series (on October 15, 1989, to be exact); and like the earlier film, Wedding won its timeslot in the ratings. ~ Hal Erickson, All Movie Guide