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Season guide

Foundation: Season 3

10 episodes Premiered Jul 10, 2025 Updated Sep 25, 2026

152 years after the events of season two, The Foundation has become increasingly established far beyond its humble beginnings while the Cleonic Dynasty's Empire has dwindled. As both of these galactic powers forge an uneasy alliance, a threat to the entire galaxy appears in the fearsome form of a warlord known as "The Mule," whose sights are set on ruling the universe by use of physical and military force as well as

Previously on Foundation

Season 3 Lore Primer

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

  • ⚡ Picks up essential narrative continuity directly following the events of Foundation Season 2.
  • ⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
  • ⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
  • ⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.

Season overview

152 years after the events of season two, The Foundation has become increasingly established far beyond its humble beginnings while the Cleonic Dynasty's Empire has dwindled. As both of these galactic powers forge an uneasy alliance, a threat to the entire galaxy appears in the fearsome form of a warlord known as "The Mule," whose sights are set on ruling the universe by use of physical and military force as well as mind control. It’s anyone's guess who will win, who will lose, who will live and who will die as Hari Seldon, Gaal Dornick, the Cleons and Demerzel play a potentially deadly game of intergalactic chess.

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Season 3 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 3 Progress Shield

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

Season 3: Filler vs. Essential Canon

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

30%
70%
Mytharc (3): Crucial lore & season climaxes
Core (7): Character development & subplots
Side Quest (0): Standalone / filler
S3·E1 Mytharc

A Song for the End of Everything

Jul 10, 2025 · 52 min

A mysterious new pirate with terrifying abilities—known as the Mule—catches the attention of the Foundation and Empire.

S3·E2 Core

Shadows in the Math

Jul 17, 2025 · 49 min

Gaal and Hari advance their plans on Ignis. Empire grapples with an unforeseen prediction. Pritcher enlists help to investigate the Mule.

S3·E3 Core

When a Book Finds You

Jul 24, 2025 · 51 min

An unexpected alliance is formed. Pritcher, Bayta, and Toran come face-to-face with the Mule. Demerzel seeks spiritual guidance.

S3·E4 Core

The Stress of Her Regard

Jul 31, 2025 · 49 min

Demerzel struggles with the paradox of her programming. Pritcher's true loyalties are revealed. Day sets off on a quest for answers.

S3·E5 Core

Where Tyrants Spend Eternity

Aug 7, 2025 · 47 min

Day enters uncharted territory. Dawn and Gaal put their plan in motion. Magnifico's worth becomes clear. Demerzel attempts to restore power.

S3·E6 Core

The Shape of Time

Aug 14, 2025 · 45 min

A long-awaited reunion turns violent. Day looks for Song. On New Terminus, the Vault opens—and the Mule takes aim.

S3·E7 Core

Foundation's End

Aug 21, 2025 · 60 min

Chaos and destruction rain down on New Terminus. Back on Trantor, Dusk and Quent unite to assess the state of the galaxy.

S3·E8 Core

Skin in the Game

Aug 28, 2025 · 47 min

Gaal and the Second Foundation reckon with the fall of New Terminus. Day faces judgment on Mycogen. Dusk's ascension looms.

S3·E9 Mytharc

The Paths That Choose Us

Sep 4, 2025 · 47 min

Gaal confronts the power of the Mule's conversions. Dusk resorts to drastic measures. Demerzel searches for clarity about the future.

S3·E10 Mytharc

The Darkness

Sep 11, 2025 · 52 min

Gaal and the Second Foundation take the fight to the Mule as Empire's legacy suffers a catastrophic blow.

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