“It’s a Wonderful Life” (8 p.m., NBC): The heartwarming classic “It’s

“It’s a Wonderful Life” (8 p.m., NBC): The heartwarming classic “It’s a Wonderful Life” returns for another airing, and you know how it works: Every time you watch this thing, an angel gets his wings ... or something like that.

“A Christmas Story” (8 p.m., TBS): The holidays aren’t complete without the annual marathon of Jean Shepherd’s “A Christmas Story.” We triple-dog dare you to watch all 12 consecutive airings.