Passing a ringed planet that looks just like Saturn, the Odyssey receives distress signals from a disabled ship. Ulysses and the children rescue the pilot, and she tells them her name Hypsipyle is and she wishes to go to the base at Istria. She wants help in freeing the women of Lemnos, after all the men imprisoned them since they rebelled against their male masters. On Lemnos, it is the women who do all the work, and work in the factories producing Tridents for the Sharkmen. As punishment for her disobedience, the Lemnos Council of Four imprisoned Hypsipyle's father, the king of Lemnos. As Ulysses escorts Hypsipyle to Istria, she tells him that her father may know the location of the Kingdom of Hades. At Istria, they find the entire base has been destroyed by Tridents, so they then head off to Lemnos itself. There, they find the factories empty, with all the women still imprisoned. They free the women, but on board the Odyssey Yumi senses that they are in danger, and so she and Telema
Elenco: Claude Giraud , Jacques Ebner , Amelie Morin , André Valmy , Annie Balestra , Annie Sinigalia , Arlette Thomas , Fabrice Josso , Francine Laine , Françoise Fleury , Gilles Laurent , Jackie Berger , Jackie Berger , Jean Barney , Jean Michaud , Jean Topart , Séverine Morisot , Marion Loran , William Sabatier , Louis Arbessier , Martine Messager , Anick Faris , Adrian Knight , Howard Ryshpan , Kelly Ricard , Matt Berman , Vlasta Vrána .