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.

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.

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.

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

Jack uses a stone giant to defeat Mondo-Bot to defend a city of robots.

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

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

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 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.

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.

After Jack left with the mysterious figure Ashi goes on a quest to find him.

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.

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

Jack encounters a haunted house in his travels and must free the family trapped inside from the evil spirit haunting them.

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”.

Aku sends the Shinobi, a deadly assassin, to kill Jack, who must use his own martial arts to survive.

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.

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

Jack learns of a powerful wishing well that can return him to the past, but must find a way past the three deadly archers who protect it.

Samurai Jack partners with a deadly assassin in order to escape a gargantuan creature that has swallowed them whole.

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.

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