The star of the FX series also admits he was initially hesitant about the crossover concept as 'It's Always Sunny in Philadelphia' heads into its 17th season.
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 "AbbottElementary" and "It's AlwaysSunny in Philadelphia" crossover episode aired Wednesday, bringing together two completely different Philly sitcom casts for an epic explosion of "Go ...
And this year, the network is making comedy history when the It’s AlwaysSunny in Philadelphia gang crashes AbbottElementary for an unforgettable crossover episode. ABC’s official synopsis ...
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