ABC's 'Abbott Elementary' will not air new episodes for two weeks following its latest episode, with the next installment, a two-part Christmas-themed event, set to return on December 4. However, fans are particularly excited for the show's crossover event with 'It's Always Sunny in Philadelphia,' which is scheduled to air on January 8, 2025, at 8:30 p.m. ET. Quinta Brunson, the creator and star of 'Abbott Elementary,' confirmed the crossover with a teaser photo featuring both casts. The crossover's production faced challenges due to cast availability, but co-showrunners Justin Halpern and Patrick Schumacker assured that the two shows will blend together despite their differing tones. The episode promises significant storylines for both casts as they come together for this unique television event. Fans can anticipate a mix of humor as the 'Always Sunny' gang interacts with the teachers of Abbott Elementary.