A Very Brady Christmas(1988)
Now that all the Brady kids are grown up, married, and/or have kids of their own, they bring you a Christmas movie special which later on starts up the newer Brady Bunch tv series "The Bradys."
After Mike and Carol Brady both plan on different Christmas vacations and mentioning them to their kids and Alice Nelson, they both realize that both were keeping secret suprises about their Christmas trips. So Alice, Mike and Carol talk about the trips they had with the kids. So at the end they decide to just invite their kids and there grand kids home for Christmas instead.