There was a time when a holiday television special would play once a year, and once only. Now, of course, the classics run nearly ‘round the clock come December, but for millions of children “Rudolph the Red-Nosed Reindeer” and “A Charlie Brown Christmas” were events they anticipated for weeks. The end result? Millions of adults who now have a special connection to the seasonal small-screen fare that was so rare and hard-to-catch a couple of decades back. Here are five mistletoe-bedecked favorites.