Abbott Elementary's crossover with It's Always Sunny sheds light on Charlie's reading struggles, hinting at a deeper story behind the Philly bar regular.
beat sheet
According to the crossover episode, Charlie's illiteracy stems from childhood trauma - he was held back a grade after a traumatic incident left him unable to read
The crossover offered a rare glimpse into Charlie's backstory, suggesting his inability to read is a sensitive issue he's long tried to conceal from his Paddy's Pub crew
call sheet
Charlie, Abbott Elementary, It's Always Sunny in Philadelphia, It's Always Sunny in Philadelphia