It's Always Sunny in Philadelphia: Season 16, Episode 3 - ProjectFreeTV

16 - 3: The Gang Gets Cursed

The Gang's going to be on Bar Rescue but a series of bad omens leads them to believe they are all cursed. They set off to undo the curses and make amends to the people/things they've wronged. While Mac, who's on a run of good luck, meets Chase Utley and invites him for a catch.