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.

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

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

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 ...

Justin Baldoni’s lawyer Bryan Freedman appeared on an episode of “The Megyn Kelly Show” where the former Fox News host played ...

After much anticipation, the unlikely meeting of the two worlds unfolded on Wednesday's installment of "Abbott Elementary." ...

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

Claim a square if the gang speaks to the camera crew, pitches a horrible business idea or scars a student for life.

McElhenney’s Mac and his partners in business and crime ... Also, as any longtime “Sunny” viewer knows, the show has provided many reasons why the Paddy’s Pub gang should not be allowed ...

Here's a look at our real-time thoughts on tonight's crossover between FXX's It's Always Sunny in Philadelphia and ABC's ...

Elsewhere, Mac (Rob McElhenney ... will air at a later date since production on Season 17 of "It's Always Sunny in Philadelphia" recently finished, per the Los Angeles Times.

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