The more things change, the more they stay the same: South Park's first and latest episodes feature tension between Santa and Jesus. Every Lassie for nearly two decades shared the same DNA. Amy Poehler makes the same basic face for 7 seasons.
Here are a few more side-by-side comparisons of the first and last episodes of some iconic TV shows:
Regan’s horrifying dance with the Devil has inspired spoofs for half a century now — and quite often, it’s been Linda Blair herself at the center of them