It's Always Sunny in Philadelphia: Season 18

2026 · 10 episodes · ★ 7.6

What Season 18 of It's Always Sunny in Philadelphia

Season 18 of It's Always Sunny in Philadelphia follows the gang running Paddy's Pub, the Irish bar in South Philly that barely makes ends meet. Charlie, Mac, Dennis and Dee want to cash in on the place, whether through money, romance or by outmaneuvering everyone else, and their crooked schemes get them into deeper and deeper trouble. Dennis and Dee are diagnosed with ADHD, but Mac is not. Then the gang gets stranded with a broken-down RV in a dangerous wasteland, fights for a spot at a Renaissance faire, and launches a campaign against alcohol abuse. Frank also takes center stage in several of these storylines.

10episodes6 aired

Aug 17, 2026premiered

3.7 hrtotal runtime

Season 18 Episodes

18x01 Frank Marries a Corpse
Aug 17, 2026 · 23 min · ★ 7.6
The guys help Frank with his cold feet ahead of his wedding to Sam. Dee tries to scare Sam off the nuptials with testimonies from The Waitress, Artemis, and Snail.
Directing: Todd Biermann · Writing: Charlie Day · Starring: Artemis Pebdani, Mary Elizabeth Ellis, Andrew Friedman, Bob Wiltfong
18x02 Dennis and Dee Don't Get Rich
Aug 17, 2026 · 23 min · ★ 7.8
The Reynolds twins push themselves to the limit to secure Sam's transfer of wealth. Charlie and Frank plan a proper memorial for Bonnie during the annual Mummers Parade.
Directing: Todd Biermann · Writing: Charlie Day · Starring: Andrew Friedman, Sandy Martin, Gregory Scott Cummins, Nate Corddry
18x03 The Gang Gets Tested
Aug 24, 2026 · 24 min · ★ 7.4
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.
Directing: Richie Keen · Writing: Charlie Day · Starring: Sam Li, Elaine Kao, Tacey Adams, Charlie Bauer
18x04 2026: A Virtual Insanity
Aug 31, 2026 · 21 min · ★ 8.0
The Gang's RV breaks down en route to a Jamiroquai concert, leaving them to fend for themselves in a dangerous wasteland of junkies and street people.
Directing: Heath Cullens · Writing: Rob Rosell, Vanessa McGee · Starring: David Hornsby, Craig DiFrancia, Ronnie Clark
18x05 The Gang Goes to the Ren Faire
Sep 7, 2026 · 23 min · ★ 8.0
Mac, Dennis, and Dee strive to conquest their way onto the Quilt of Legends at the local Renaissance Faire. Charlie discovers a love of luting while Frank tries to acquire the faire from old foes.
Directing: Richie Keen · Writing: Rob Rosell, Dave Chernin, John Chernin · Starring: Jimmi Simpson, Nate Mooney, Guillermo del Toro, Nick Kroll
18x06 The War on Alcohol
Sep 14, 2026 · 24 min · ★ 7.5
The Gang takes the trend against drinking into their own hands. Dennis, Dee, and Frank look to recruit white collar suits for happy hour while Mac and Charlie seek to enlist blue collar factory workers so they can return the bar to the melting pot it once was.
Directing: Dave Chernin, John Chernin · Writing: Dave Chernin, John Chernin · Starring: Tyler Tomás Perez, Dan Ahdoot, Andrew Key, Danene Montella
18x07 Gilligan's Island: A Conspiracy Theorist's Paradise Coming soon
21 min · ★ 6.4
Mac and Charlie drink the proverbial Kool-Aid while trying to uncover the mystery of why 'Gilligan's Island' never made it to 100 episodes.
Directing: Heath Cullens · Writing: David Hornsby, Biniam Bizuneh
18x08 Mac and Dennis Tear Their ACLs Coming soon
21 min · ★ 6.8
After a Christmas card catastrophe, Charlie nurses a bedridden Mac and Dennis and deliberates on which one is the originator of all their ideas. Dee and Frank are tired of being the bottom of the communication ladder and decide to flip the script.
Directing: Heath Cullens · Writing: David Hornsby
18x09 Frank's Team: A Dark Day for Baseball Coming soon
21 min · ★ 7.8
In an effort to clean up their image, Paddy's sponsors a local Little League team. But when The Gang spots softness in their franchise, they impose a radical new culture: win no matter what and do whatever it takes to get ahead.
Directing: Heath Cullens · Writing: Rob Mac, Charlie Day, Ross Maloney
18x10 The Guys Have a Sleepover Season Finale
22 min · ★ 8.2
Blinded from LASIK surgery, Dee pleads for the guys to spend the night to keep her safe from neighborhood crime, but they listen to the wolves inside themselves and opt for a dudes-only sleepover of their own.
Directing: Todd Biermann · Writing: Glenn Howerton, Charlie Day