Many fans of It’s Always Sunny in Philadelphia worry that the series will end following the conclusion of the upcoming Season 18. Read our spoiler-free review of It's Always Sunny in Philadelphia Season 18 to determine how much you'll be able to stomach:It's Always Sunny in Philadelphia Season 17 ended with a tear-jerking tribute to the late, great Lynne Marie Stewart, whose passing in February, 2025 left an unfillable hole in the Always Sunny family. The first two episodes of Season 18 deal with the diegetic loss of Stewart's character, Bonnie Kelly, and there is a symmetric and touching tastelessness in how Charlie and his friends choose to honor her. But the on-and-offscreen deaths that affect It's Always Sunny in Philadelphia aren't the only sources of indulgently dark comedy in the series. It's Always Sunny in Philadelphia Season 18 continues to intensify the Gang's irredeemable nature, but, pivotally, it maintains the morbidly codependent chemistry that made us fall in love with these felons in the first place.