The Abbott Elementary and It's Always Sunny In Philadelphia crossover exceeded expectations, but Glenn Howerton's Dennis was suspiciously absent from the majority of the episode. When the shows ...

Dennis is conspicuously absent from ... When the cast of “Abbott Elementary” appears in an episode of “It’s Always Sunny in Philadelphia,” as is planned for the coming season.

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

However, upon hearing this Dennis angrily walks out of shot ... First clip from the first ‘ABBOTT ELEMENTARY’ and ‘IT’S ALWAYS SUNNY IN PHILADELPHIA’ crossover episode.

Abbott Elementary” and “It’s Always Sunny in Philadelphia" don’t have much common ground. That’s why their collaboration felt ...

Spoilers* In the highly anticipated ninth episode of “Abbott Elementary’s” fourth season, which aired on Wednesday, Jan. 8, ...

The cast of It’s Always Sunny in Philadelphia made its way to the ABC ... Kaitlin Olson’s Dee and Glenn Howerton’s Dennis visiting Willard R. Abbott Elementary — and at odds with Quinta ...

As has been shown time and time again across the many seasons of It’s Always Sunny In Philadelphia, Dennis, Dee, Mac, Charlie and Frank are terrible people. They are frequently horrible to one ...

The worlds of "Abbott Elementary" and "It's Always Sunny in Philadelphia" collide next week ... Dee, Charlie, Dennis and Frank to help out, but "things don't go as planned." ...

The "It's Always Sunny in Philadelphia" crew is headed to "Abbott Elementary" in the first of two crossover episodes.

Dennis (Glenn Howerton ... crossover 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.