During the episode nine premiere, the "It’s Always Sunny in Philadelphia" cast will join the "Abbott Elementary" team in an epic crossover episode as both shows happen to take place in Philly.
"Abbott Elementary" is airing the 9th episode of its 4th season on Wednesday, Jan. 8 at 9:30 p.m. The episode will be a crossover with "It's Always Sunny in Philadelphia." There are several ways to ...