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Season guide

It's Always Sunny in Philadelphia: Season 10

10 episodes Premiered Jan 14, 2015 Updated Sep 25, 2026
Previously on It's Always Sunny in Philadelphia

Season 10 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of It's Always Sunny in Philadelphia Season 9.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 10 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 10 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 10: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

40%
60%
Mytharc (4): Crucial lore & season climaxes
Core (6): Character development & subplots
Side Quest (0): Standalone / filler
S10·E1 Mytharc

The Gang Beats Boggs

Jan 14, 2015 · 21 min

Mac oversees the gang while they compete to break Wade Boggs’ legendary beer drinking record.

S10·E2 Core

The Gang Group Dates

Jan 21, 2015 · 24 min

The gang gets into the online dating scene to expand their matchmaking potential.

S10·E3 Core

Psycho Pete Returns

Jan 28, 2015 · 22 min

When Psycho Pete, long lost member of the freight train, is released from the mental hospital, Dennis and Dee rush to get him recommitted while Charlie and Mac attempt to restore h

S10·E4 Mytharc

Charlie Work

Feb 4, 2015 · 20 min

Charlie goes into overdrive when he's notified that the health inspector will be arriving that day. Meanwhile, the rest of the gang is trying to exploit a flaw in the air-miles rew

S10·E5 Core

The Gang Spies Like U.S.

Feb 11, 2015 · 21 min

Dennis and Mac enlist Dee to spy on the fish factory across the street, Charlie and Frank grow suspicious and decide to do some spying of their own.

S10·E6 Core

The Gang Misses the Boat

Feb 18, 2015 · 22 min

The group separates from one another to find out who they are as individuals after another failed endeavor.

S10·E7 Core

Mac Kills His Dad

Feb 25, 2015 · 20 min

News surfaces about Mac's Dad, Luther, being a murder suspect. Mac goes into full "P.I." mode to clear his father of any wrong doing.

S10·E8 Core

The Gang Goes on Family Fight

Mar 4, 2015 · 20 min

When the gang appears on a nationally broadcasted game show, Dennis does his best to keep the gang’s weirdness under wraps.

S10·E9 Mytharc

Frank Retires

Mar 11, 2015 · 21 min

Frank decides to retire; the foursome begin to plot and plan ways for each of them to take control of the bar.

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