If you want to see “A Charlie Brown Christmas” this year, you won’t find it on broadcast TV. The special featuring the Peanuts gang is now exclusively available on Apple TV, where new subscribers can get a 7-day free trial. But you don’t have to sign up to see Linus, Lucy and Snoopy. Apple TV is also making “A Charlie Brown Christmas” available for non-subscribers to watch for free on Saturday, December 16th and Sunday the 17th.