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.

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.

Aku summons the three immortal servants of Set to destroy Jack while he travels through Egypt. To destroy them, Jack must assemble a golden scarab using clues from his time as a young boy.

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.

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

Jack looks for his sword and Ashi fends off attackers, including someone from her past.

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

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, 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 […]

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.

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.

While continuing on his mission, Jack is followed by an overly friendly creature who accidentally thwarts his every move. To make matters worse, he’s attacked by robotic bounty hunters.

When Jack hears rumors of a time portal being found in the underwater city of Oceanus, Jack sets out to the city and is welcomed by its Triceraquins, but is unprepared for a terrible surprise.

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.

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.

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

The Scotsman needs Jack’s help in rescuing his kidnapped wife from Celtic demons in the castle of Boon.

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.

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 […]

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.

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.

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.

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

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