'Abbott Elementary'-'Always Sunny' Crossover Was Full of Easter Eggs VarietyThe Payoff of TV’s Most Awaited Crossover The Atlantic‘It’s Always Sunny in Philadelphia’ Attends ‘Abbott Elementary’ The New York TimesWhen 'Abbott' Met 'Sunny': Quinta Brunson and Rob McElhenney on Their Odd-Couple TV Crossover Rolling StoneAbbott Elementary Recap: The Gang Goes Back to School Vulture