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

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 star of the FX series also admits he was initially hesitant about the crossover concept as 'It's Always Sunny in ...

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 Sunny in Philadelphia," which has aired on FXX since 2013.

The Abbott Elementary & It's Always Sunny In Philadelphia crossover had hilarious character interactions, but it hid callbacks in its witty writing.

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

To sign up, head over to Hulu and be sure to click SIGN UP FOR HULU ONLY. It’ll bring you to Hulu’s subscription page; select the $9.99/month Hulu plan, create an account, and provide payment ...

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 Abbott Elementary.

Therefore, eventually, we will see the other half of this marvelous crossover. Until then, I’ll be theorizing about the ...

In the newest Abbott episode, "Volunteers," The Gang gets educated. The Abbott Elementary/It’s Always Sunny in Philadelphia Crossover Brought Out the Weirdest of Both ...

The “It’s Always Sunny in Philadelphia” crew is headed to “Abbott Elementary” in the first of two crossover episodes. The highly anticipated crossover episode will see Charlie (Charlie ...

A new “Abbott Elementary” episode brings volunteers from “It’s Always Sunny in Philadelphia.” The crossover episode airs Wednesday, Jan. 8, at 8:30 p.m. ET on ABC.