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.
A mysterious new pirate with terrifying abilities—known as the Mule—catches the attention of the Foundation and Empire.
Gaal and Hari advance their plans on Ignis. Empire grapples with an unforeseen prediction. Pritcher enlists help to investigate the Mule.
An unexpected alliance is formed. Pritcher, Bayta, and Toran come face-to-face with the Mule. Demerzel seeks spiritual guidance.
Demerzel struggles with the paradox of her programming. Pritcher's true loyalties are revealed. Day sets off on a quest for answers.
Day enters uncharted territory. Dawn and Gaal put their plan in motion. Magnifico's worth becomes clear. Demerzel attempts to restore power.
A long-awaited reunion turns violent. Day looks for Song. On New Terminus, the Vault opens—and the Mule takes aim.
Chaos and destruction rain down on New Terminus. Back on Trantor, Dusk and Quent unite to assess the state of the galaxy.
Gaal and the Second Foundation reckon with the fall of New Terminus. Day faces judgment on Mycogen. Dusk's ascension looms.
Gaal confronts the power of the Mule's conversions. Dusk resorts to drastic measures. Demerzel searches for clarity about the future.
Gaal and the Second Foundation take the fight to the Mule as Empire's legacy suffers a catastrophic blow.
