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.
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 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.
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.
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.
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.
After his lack of jumping skills cause him to lose a chance to return home, Jack helps a peaceful tribe of apelike creatures and their human leader defend themselves against the attacks of a larger rival tribe in return for lessons on how to “jump good”.
The samurai is plunged into a dystopian world ruled by Aku, adopting the name “Jack”. After getting in a fight at a nightclub, he is hired by a group of canine miners to protect them from Aku’s forces.
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 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.
Five of the world’s greatest bounty hunters gather to compete for the chance to kill Jack. A sixth hunter, revealed to be the princess of a fallen kingdom, persuades the group to work together instead.
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.
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.
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.
