With the first part of 'Abbott Elementary' and 'It's Always Sunny in Philadelphia's crossover airing Wednesday on ABC, Kaitlin Olson has some tips.

It's Always Sunny in Philadelphia's Kaitlin Olson handpicks 'slightly tamer' episodes that Abbott Elementary fans might enjoy.

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.

Charlie, Mac, Dee, Dennis and Frank will cross paths with Janine, Ava, Barbara, Gregory, Melissa, Jacob and Mr. Johnson The post Where to Watch the ‘Abbott Elementary,’ ‘It’s Always Sunny in Philadelphia’ Crossover appeared first on TheWrap.