Angered by the failure of his bounty hunters and mercenaries to defeat Jack, Aku uses the samurai’s “inner darkness” to create an evil counterpart. Jack has trouble fighting “Mad Jack” until he relinquishes his anger, erasing Mad Jack from existence.

A talented warrior named Ikra joins Jack as he seeks a magical jewel that could send him back to his own time. The jewel judges Ikra to be impure of heart and spawns a monster she defeats. She then destroys the jewel, revealing “herself” as Aku and derailing Jack’s quest.

Jack encounters an overly friendly creature who accidentally thwarts his every move and eats a jewel that can return him to the past. Although Jack deserts the creature in anger, it returns to help him by shapeshifting into a monstrous being and rescuing him from robotic bounty hunters with a 1950s aesthetic.

Jack volunteers to rescue an innkeeper’s daughter by infiltrating a rave party after witnessing the participants stage a riot. He learns that the DJ is one of Aku’s servants, who has been using his music to hypnotize local youths into becoming his master’s slaves. The DJ combines his sound equipment into a robot exoskeleton, which […]

On a global television broadcast, Aku reprises his opening narration from the last four seasons before announcing he has captured Jack and his sword. Before Ashi can kill the samurai, many of Jack’s allies arrive and assault Aku and his fortress. After they free Jack, Aku overpowers them, and Ashi prevents him from recovering his […]

The Scotsman invites Jack to help rescue his kidnapped wife from robotic Celtic demons. After Jack proves himself to the Scotsman’s rowdy clan, the two venture into the Castle of Boon and save the wife from being cooked into a stew. She angrily overpowers the demon army when their leader calls her “fat”.

Aku, an evil shape-shifting demon, devastates a boy Japanese prince’s land and abducts his father. After years of training in exile around the world, the prince returns as a young man, receives a samurai outfit and a mystical katana, frees his people from Aku’s minions, and battles Aku despite his father’s warnings. Before the prince […]

Jack discovers a village overpowered by a stench emanating from a mountain-dwelling dragon with severe indigestion. He navigates the dragon’s complicated digestive system and finds the source of the dragon’s flatulence: a baby dragon spitting fire from its partially hatched egg, whom he then frees.

When Jack hears rumors of a time portal being found in the underwater city of Oceanus, he journeys to the city and is welcomed by its alien inhabitants, the Triceraquins. He learns the “time portal” is a trap planted by Aku, who breaks a pact he made with the Triceraquins, prompting Jack to fight to […]

Three short stories are presented in the following order: Jack vs. the Worm – Jack confronts a two-headed riddling worm that could grant his wish to return home. He answers a challenging riddle and allows himself to be eaten by the worm, only to learn the worm is not magical at all. The Metal-Eaters – […]

When robot bikers destroy his sandals, Jack seeks revenge but realizes that he can’t do so without footwear. After unsuccessfully trying out a variety of shoes, he follows a boy with sandals like his to a traditional Japanese family home, where the boy’s father makes him new sandals.

Millions of years ago, the gods Ra, Rama, and Odin battle a shapeless black mass, a piece of which crashes down to earth, killing the dinosaurs. It develops into a pit of dark liquid, killing all in its wake from prehistory to the dawn of Japanese civilization. In feudal Japan, Jack’s father, the Emperor, sets […]

Aku tricks Jack into entering a cursed graveyard and summons an army of undead warriors. Jack defeats them, but a ghostly hag steals his sword and brings it to Aku, who tries to kill Jack using it. As he is about to stab the samurai, Aku discovers that the sword, which can’t be used for […]

After his lack of jumping skills costs him a chance to return home, Jack helps a peaceful tribe of ape-like creatures and their human leader defend themselves against the attacks of a larger rival tribe in return for lessons on how to “jump good”, which involves gravity-defying feats.

While crossing a seemingly endless bridge, Jack runs into the Scotsman: a robust, aggressive, stereotypical Scottish warrior who also wields an enchanted sword. Their argument turns into a long, exhausting fight without a clear victor. After realizing that Aku has placed bounties on both of them, they join forces to fight Aku’s bounty hunter army […]

Aku sends his servant Demongo, a demon who captures and enslaves the souls of warriors to serve him, to destroy Jack. Realizing he cannot destroy the warriors’ essences, Jack finds a way inside Demongo and releases numerous warriors’ souls from within, allowing them to return to the physical world and overpower the demon.

Aku summons the three immortal servants of Set to destroy Jack while he travels through Egypt. Jack searches for pieces of a golden scarab using clues from a temple he explored in his boyhood. Once completed, the scarab flies away, and the god Ra arrives to destroy Set’s minions. Jack asks Ra to help him […]

Ashi bonds with Jack as he tells her of his life before Aku. During the night, Jack ventures off alone, and by day happens upon the location where he unsuccessfully fought the Guardian of a time portal he was prophesied to use.[33] He finds the portal destroyed, as well as the Guardian’s broken red glasses. […]

Aku sends a robot shinobi to kill Jack. While Jack is fighting to save a village from giant, robotic lobsters, the shinobi kidnaps a small boy and traps him in an ancient temple. Inside, Jack, understanding that the shinobi hides in shadows, hides in sunlight by fashioning his gi into a white ninja outfit, then […]

Jack follows a mysterious voice into a volcano and survives a series of traps to meet a Viking warrior transformed into a giant rock figure by Aku. At the Viking’s insistence, Jack reluctantly slays him in battle so that he can reach Valhalla.

Aku challenges the Imakandi, a group of highly-skilled leonine alien hunters, to capture Jack. They pursue him extensively through Aku City and eventually capture him, but because they value the thrill of hunting, they judge Jack to be a worthy enough target to go free before Aku can claim his prize.

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/or Jack as a villain, but the children are not easily convinced. Aku leaves in defeat while the children make up […]

While investigating the destruction of several scattered villages, Jack learns that Aku’s new “ultra-robot” assassins, fueled by the demon’s essence, are responsible. Unable to destroy them alone, he receives unexpected assistance from the mad scientist who invented them and calls on the spirits of his ancestors to give him the strength to slay the last […]

The samurai is plunged into a dystopian world ruled by Aku, adopting the name “Jack” upon hearing several aliens call him the name. Following a nightclub brawl, he meets three dog archaeologists and offers to protect them from Aku’s forces.

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

Odin’s horse Sleipnir frees the Emperor from Aku’s clutches and carries him to a mountaintop fortress. Inside, he suddenly finds himself in a heavenly realm before the gods, who forge a katana imbued with his righteous spirit. The Emperor then uses this sword to seal Aku below the earth. Upon learning his son is born, […]

Jack enters the ruined city of Andromeda and is rescued from the monstrous robot Mondo-bot by friendly robots, who inform him that Andromeda was built atop an ancient, magical city of stone giants. He discovers an enormous stone samurai underwater, which fires an optic beam to merge with him, allowing him to control the stone […]

Approximately fifty years after the events of the original series, Jack has not aged as a side effect of time travel. His sword is lost, he has given up hope of returning to his time, and he is tormented by hallucinations of his deceased parents, his kingdom, and a mysterious armored figure on horseback. Jack, […]

Jack boards a train to his next destination, only to be pursued by Ezekiel Clench, a bounty hunter armed with multipurpose mechanical hands, and his ex-wife Josephine. They battle on the train until the Clenches capture Jack, but Josephine shoves Ezekiel off to claim Jack’s bounty for herself, prompting Jack to use his chains to […]

Seeking to end their struggle, Aku proposes a duel between him and Jack, with neither using their magical abilities. Jack correctly suspects Aku will try to cheat and hides fake swords all over the battleground. As Aku, who also suspected Jack would cheat, realizes this, Jack uses his true sword to force him to flee […]

Jack chases a mysterious rabbit, who stole his clothing while he was bathing, into a whimsical underground world, where he hides from authorities using various disguises. He ultimately learns the thief is an orphaned little girl seeking to sell his clothing, so he gives her tusks from a robot slug he fought earlier to help […]

Jack is guided by a variety of creatures to a mysterious portal capable of returning him to the past, but he learns that only the man who can defeat its guardian in combat can use it. The guardian defeats Jack but spares him, prophesying that Jack is not yet ready as he watches the portal […]