It's Always Sunny in Philadelphia Season 18 Episode 3
The Gang Gets Tested
Dennis and Dee are diagnosed with ADHD, and even more shocking: Mac isn't. They go back to school for a do-over now that they understand their brains more better.
Guest Stars
Sam Li
Jie
Elaine Kao
Professor Lee
Tacey Adams
Psych Professor
Charlie Bauer
Johnny's Goon
Addison Bowman
Madison