While ascending a mountain, Jack encounters a hidden society of warriors who have fought a nearly 500-year war against an army of robots and offers to help them put an end to it.

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, 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 […]

The source of Jack’s amnesia is discovered in three beautiful sirens, whose bewitching song can hypnotize the strongest warrior.

Aku sends his servant Demongo, a demon who captures and enslaves the souls of warriors to serve him, to destroy Jack.

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

A village is overpowered by a stench coming from “The Spire”. Jack investigates and finds a dragon with severe indigestion.

Out of weapons and pursued relentlessly by the masterful seven Daughters of Aku, Jack faces what may be his final confrontation.

Seeking to weaken Jack’s popularity among his subjects, Aku gathers the children of the world in his palace and tells them a series of “fairy tales”, all of which portray himself as a hero and Jack as the villain.

X-49, a retired robot hitman, is blackmailed by Aku into coming out of retirement to hunt down Jack.

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.

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’s worst fear is realized when he faces off against Aku; the demon makes a shocking discovery about Ashi that puts her in grave danger.

Jack is attacked by two monks, who he realizes are members of the order he once trained with. Their master informs Jack of an ancient temple that can send him home, but which is protected by an army of stone warriors.

While training in Africa as a child, Jack must save his master and his people from a rival tribe serving Aku.

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.

The fate of the entire universe hangs in the balance as Samurai Jack faces Aku.

Jack survives a series of traps and encounters a Viking king transformed into a giant rock figure by Aku, who insists that Jack slay him in battle so that he can reach Valhalla.

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 is transformed into a chicken after bumping into a cranky wizard and winds up being captured by a greedy man (Luther Creek) who seeks to turn him into a prizefighter.

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

Jack finds a booby-trapped labyrinth, in the center of which is a diamond which could send him back to his own time. But a mysterious stranger, who has also entered the maze, could put Jack’s plans in jeopardy.

Seeking to end their struggle, Aku proposes a one-on-one duel between him and Jack, with neither combatant using their magic abilities. Jack agrees, but Aku’s honesty is unclear.

Aku leads Jack into a cursed graveyard, where he is attacked by an army of undead warriors. Jack defeats them, but then discovers Aku’s true plan: kill Jack with his own sword.

A talented warrior named Ikra joins Jack as he seeks a magical jewel that could send him back to his own time. However, Ikra’s true motives threaten to derail his quest.

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.

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

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.

Jack is goaded into a duel by an arrogant, bullying “samurai”, and is given the chance to demonstrate the true ways of the warrior.

A gravely injured Samurai Jack chooses to create his own fate by going up against the deadliest foes he’s ever faced, Assassins from the Cult of Aku.

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.

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.