In January, the characters of the FX series It's Always Sunny in Philadelphia showed up as court-appointed volunteers on an episode of the ABC sitcom Abbott Elementary. The crossover continues July 9.

The "It's Always Sunny in Philadelphia" gang visited "Abbott Elementary" in last night's episode. Here's how to catch up on the crossover for free.

“It’s Always Sunny in Philadelphia” is currently in the writers’ room, with an eye toward shooting Season 17’s eight episodes later this fall. (Angelique Jackson contributed to this report.) ...

“Abbott Elementary” star and creator, Quinta Brunson, and “It’s Always Sunny in Philadelphia” star and co-creator. Rob McElhenney, both shared news they’re collaborating on a crossover ...