It's Always Sunny in Philadelphia S17E06 - Overage Drinking: A National Concern
Summary:
When Tammy and Trey, now in their 40s, show up to remove their teenage son from Paddy's, Dennis and Dee attempt to reconnect with their former prom dates. Frank's sudden disappearance sends Mac and Charlie on a mission to track down his whereabouts.
It's Always Sunny in Philadelphia S17E6 Screenshot