The prince and princess of an alien planet are imprisoned by Aku when they come to Earth seeking his assistance and only Jack can rescue them.

Centuries ago, the demon Aku is accidentally released by Jack’s father, who receives a magic sword from the gods. Eventually, he uses the same sword to imprison Aku beneath the earth.

Jack is captured and taken to the “Dome of Doom”, where he forced to fight as a gladiator against the Dome’s champions.

Samurai Jack and Ashi find themselves hunted by one of the Galaxy’s deadliest creatures.

Jack rescues a baby from hungry ogres, but then trying to find the child’s mother while caring for it and protecting it may be his greatest challenge. During the episode, Jack retells the story of Momotaro to the baby.

While investigating the destruction of several scattered villages, Jack learns that Aku’s new “ultra-bots” are responsible. Unable to destroy them, he receives assistance from an unexpected source: their creator.

Jack infiltrates a rave party after witnessing the participants stage a riot in a nearby town. It turns out that the DJ is one of Aku’s servants, and has been using his music to hypnotize the local children into becoming his master’s slaves.

When a gang of robot bikers destroy his sandals, Jack seeks revenge, but realizes that he can’t do so without footwear, something he has difficulty choosing.

While crossing a seemingly endless bridge, Jack runs into the Scotsman: a robust, if impulsive, stereotypical Scottish warrior who also wields an enchanted sword and would rather duel with Jack than peacefully negotiate a way for both of them to safely cross. After realizing that Aku has placed bounties on both of them, however, they […]

The Scotsman suddenly discovers Jack aboard a ship with his memory completely blanked out. Refusing to let Jack think he’s an ordinary commoner, the Scotsman sets out to discover what caused the samurai to suffer his amnesia – and stave off bounty hunters after a now defenseless Jack, having forgotten how to wield his sword.

When Aku catches a cold and spreads it to Jack, Jack is accidentally infected with Aku’s evil. Jack desperately seeks out a cure before Aku’s essence transforms him into the monstrosity himself.

Three short stories about some of Jack’s confrontations. He confronts a two-headed riddling worm, a family that feeds on metal, and a gargoyle who is imprisoning a fairy.

After accidentally exposing a colony of scientists seeking to escape Earth, Jack trains as an astronaut to protect them from Aku’s robots.

Aku, an evil shape-shifting demon, devastates a young prince’s land in Medieval Japan, and his parents send him into exile. After years of intensive training, the prince receives a mystical sword and samurai’s robes, and frees his people from Aku’s minions. He then defeats Aku in battle, but before striking the final blow the latter […]

As he experiences summer, autumn, winter, and spring, Jack must overcome the dangerous foes he encounters during each season.

Upon stumbling onto the ruins of his family’s estate, Jack recalls some of his childhood memories.

Jack must chase a mysterious thief who stole his clothing while he was bathing, but things get complicated when his pursuit leads him into another world, whose denizens could gaze on his nudity.

Jack searches for truth by climbing the “Mountain of Fatoom” with three monks.

A samurai warrior fights against the evil entity that took him away from his home world.

Recognized as a mighty warrior, Jack is guided to a mysterious portal capable of returning him to the past. However, he learns that only one man can use the portal: the man who defeats its unbeatable legendary Guardian. The Guardian defeats Jack but spares him, prophesying that Jack is not yet ready.

Aku challenges the Imakandi, regarded as the greatest hunters in the universe, to capture the ultimate prey: Jack.

Jack meets a swamp hermit who guides him to the three gems of Cronus which can take him home, but the hermit is Aku in disguise.

Angered by the failure of his bounty hunters and mercenaries to defeat Jack, Aku uses the samurai’s inner darkness to create an evil clone whose sole purpose is to destroy him.

Armed with various weapons and traps, Jack single-handledly defeats Aku’s “beetle-bots”. He subsequently vows to fight the demon’s oppression until he can return to the past.