When the narcissistic gang from "It’s Always Sunny in Philadelphia" visited the "Abbott Elementary" school in a crossover episode earlier this year, audiences got to see the two Philly TV universes collide in hilarious ways — all while keeping the episode PG for "Abbott’s" more family-oriented viewers.

Abbott Elementary” fans, you’ve never seen sweet and innocent school teacher Janine Teagues like this. But on Wednesday’s Season 17 premiere of “It’s Always Sunny in Philadelphia,” Janine — and much of the rest of the show’s cast,

Season 17, Episode 1 of FX's "It's Always Sunny in Philadelphia," marks part two of its crossover event with ABC's "Abbott Elementary."