AsAbbott ElementarySeason 4 returned from hiatus, it incorporated the characters from the long-running series as court-ordered volunteers.

Despite their differences, the connections worked fairly well.

Frank and Mr. Johnson’s hilarious rivalry came out of nowhere to steal the crossover episode.

William Stanford Davis as Mr. Johnson in Abbott Elementary

Image via ABC

Frank and Mr. Johnson spend the episode dealing with a raccoon terrorizing the garden Gregory and his students tend.

Frank joins the raccoons in trashing the garden and getting caught in Mr. Johnson’s trap.

Though random, this storyline adds a level of ridiculousness to the episode that melds the two shows together.

Actress Sheryl Lee Ralph as Barbara Howard sitting in her home in Abbott Elementary Season 3 Episode 12

Image via ABC

And onAbbott Elementary’s side, Mr. Johnson is the perfect person for that task.

It’s time to stop relegating this fabulous teacher to the B-plot.

Mr. Johnson (William Stanford Davis),  Gregory (Tyler James Williams), and Frank (Danny Devito) in the Its Always Sunny in Philadelphia and Abbott Elementary crossover

Image via ABC

Abbott Elementary Season 3 TV Series Poster

A workplace comedy centered around a group of dedicated teachers - and an oblivious principal - in a Philadelphia public school where, despite the odds stacked against them, they are determined to help their students succeed in life.

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Abbott Elementary

It’s Always Sunny in Philadelphia