The highly anticipated crossover episode of “Abbott Elementary” and “It’s Always Sunny in Philadelphia” blends the raunchy, ...

Between Frank's strange lines and Charlie's hilarious speeches, the It's Always Sunny gang left fans with a lot of hilarious ...

As of Jan. 9, the episode is available to stream on Hulu. The second crossover is expected to be an episode of "It's Always ...

Here's some background and inside jokes to help fill in some of the gaps for viewers who don't watch both Philly-based shows.

Charlie learns to read, Dee impersonates Ben Franklin, and Frank fights raccoons. We don't quite know what's up with Dennis ...

The cast of It’s Always Sunny in Philadelphia made its way to the ABC ... Rob McElhenney’s Mac, Danny DeVito’s Frank, Kaitlin Olson’s Dee and Glenn Howerton’s Dennis visiting Willard ...

The two sitcoms could hardly be more tonally different, but this week’s crossover episode of “Abbott” was relatively seamless ...

Charlie, Mac, Dee, Dennis and Frank will cross paths with Janine, Ava, Barbara, Gregory, Melissa, Jacob and Mr. Johnson The ...