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On his trip back to Earth, Ulysses' son is carried off by the Cyclops to give sight to his followers with Telemachus' life force. Ulysses destroys the Cyclops and saves Telemachus, Yumi and Numinor. In retaliation the ancient Gods then send his ship, the Odyssey, into an unknown part of space with the bulk of its crew cursed to remain lifeless, floating in mid-air until Ulysses finds the Kingdom of Hades.

Su di un isolato asteroide, il cieco Heratos e la sua compagna Zotriana Atena tentano di contattare l'Odissea. Gli dei dell'Olimpo, che presero la vista di Heratos, si offrono di restituirgliela se manderà Ulisse verso il cimitero dei naufraghi. Solo quando però arrivano a minacciare la vita di Atena, accetta a malincuore di tradire Ulisse. L'Odissea riceve il segnale, e si dirige verso l'asteroide di Atena ed Heratos. Atena spiega di essere stata trovata da bambina da Heratos, unica sopravvissuta in un'astronave, e lo stesso Heratos racconta ad Ulisse di una sfera nera, posta accanto ad Atena nella nave. Dopo aver toccato la sfera, scoprì che si trattava del diario di bordo della nave, provvisto di una mappa dell'intero Olimpo, con la rotta verso i ghiacciai galattici. Per impedigli di apprenderne i segreti, gli dei gli tolsero la vista, e lui ed Atena si schiantarono su di un asteroide. Heratos finge di dare ad Ulisse la rotta per i ghiacciai galattici, indirizzandoli invece verso il cimitero dei naufraghi. Pentito, confessa però il suo crimine ad Atena,e insieme partono nel tentativo di salvare Ulisse dal suo destino...

The Odyssey comes across a lifeless city world. On hearing that its people had the technology to bring the dead back to life, Yumi takes Numinor to the planet to revive him. However, she learns why there is no life in the city.

Ulysses is saved from a Trident attack by Chronos, the god of time, who wants to use him as leverage to be allowed to reenter the home of the gods.

Numinor is awaken when The Odyssey chances upon a satellite world that has strayed far from it's orbit around he and Yumi's home world. Ulysses, Telemachus, Nono, Numinor and Yumi head down to the planet and make the startling discovery that the entire population has been turned to stone by an evil Witch.

Aeolus, King of the winds, kidnaps Ulysses to provide entertainment for his daughter's birthday party. Unable to watch her father's cruel sport, she frees the captives and helps them escape.

Ulysses encounters Sisyphus, a king condemned to fill a crater with boulders for all eternity for having dared to want the secret of immortality. Zeus has promised Sisyphus he can leave if he makes Ulysses take his place.

A space storm revives the companions as crazed automatons who take over the ship and try to crash it into space glaciers.

Passing through the domain of the great Sphinx, Ulysses must answer his riddle to leave safely. His treacherous daughter kidnaps the children and plots to make Ulysses her slave.

The Odyssey arrives on a tropical planet, where the ruling tyrant uses a magic prism to shrink them.

Trying to help a stranded astronaut, Ulysses tries to find a hidden base on one of the deadly twin planets Scylla or Charybdis.

Ulysses follows a Trident carrier in hopes of learning more about the way out of Olympus, and finds himself trapped in bizarre worlds. To save the children, he will have to give up his memories.

Pirates kidnap the children to force Ulysses and No-No to brave the danger of the Sirens, said to guard a map of the Olympus universe.

Coming across a piece of Zotra that could bring Numinor back to life, Ulysses and Yumi pursue it to a swamp planet where they are ambushed by monsters who can copy their forms

Sur leur route, nos héros rencontre une planète, copie conforme de la Terre, à sa période glaciaire, il y a 300 millions d'années: est-ce réellement la terre ou sont ils retourné dans le passé?? L'exploration se passe sans encombres jusqu'à ce qu'ils soient attaqué par des vautours cybernétiques. Trouvant refuge dans une ville futuriste souterraine, ils font la connaissance de Soria, qui prétend attendre le déluge...

The crew of the Odyssey are enslaved by the magic of the enchantress Circe and turned into pig-people to build a tower that will house all the knowledge of the universe.

The shapechanger Nereus calls Ulysses for help when Shark Men, servants of the gods, take over his planet.

Princess Ariadne comes upon the Odyssey, and asks for Ulysses' help in saving her lover Theseus, who has been exiled to her father's labyrinth to be killed by the fearsome Minotaur.

Mercurius, the bubble-dwelling "grandson of the gods," enlists Ulysses' help in taking a jewel from the brow of the giant Atlas under the promise that it will give him the power to send Ulysses home.

Ulysses is saved from an attack by the most powerful magician in the universe who breaks the gods' curse on his crew; however, as payment for his services, demands to hunt Ulysses's best men.

Princess Hypsipyle of the planet Lemnos is found by Ulysses; she tells them that the women of her planet are being forced by the Shark Men to build ships for the gods.

The Odyssey is dragged to a planet populated by machines, and governed by the tyrannical computer Cortex. One of its inhabitants, a "female" robot named Nanette, falls in love with No-No.

Ulysses and the children are sent back in time and meet the original Ulysses, Telemachus and Penelope of Homer's epic.

Needing raw materials to repair the Odyssey, Ulysses travels to a world where the inhabitants are addicted to eating seeds which induce amnesia.

The Odyssey responds to a distress call from Queen Calypso, who tells him that if he saves her planet she will tell him the way back to earth. Calypso has been ordered by Zeus to betray Ulysses, but she falls in love with him and cannot carry out the gods' orders.

Nell'episodio finale, Ulisse e i suoi compagni raggiungono il Regno di Ade. Incontrano Orfeo, che chiede l'aiuto di Ulisse per ritrovare la sua amata Euridice, rapita da Caronte e portata nel Regno di Ade. Ade, il dio dell'oltretomba, dice a Ulisse che deve abbandonare i suoi compagni se vuole tornare sulla Terra. Lui rifiuta l'offerta, che in realtà era la prova finale, e tutti fanno ritorno a casa.