Hercules, Iolaus and some other former Argonauts find out that their former leader Jason is a scared drunk since he left Medea for another and saw his new family murdered; the rule of his kingdom Argos has passed to a regent. Having witnessed an apparently demon-lead party steal the Golden Fleece, they set out once again to bring it back on the Argo. Soon they strife and casualties fall but Hercules guesses the demon's identity, a rival for Jason's throne, when they're trapped in a volcano. Hera has enlisted Marcus the regent to have skeleton warriors destroy them ...

Alcmene tells Hercules and Iolaus that she is to marry Jason. Hera resurrects the Blue Priest who plans to kill Hercules at the wedding. Meanwhile as Jason must give up his crown as Alcmene is not of royal descent, Hercules sends Iolaus to seek at his half-brother Ipicles, hoping Ipicles can become the new king of Corinth.

Hera unleashes the Enforcer mk. II, made of fire. When this fiery foe kills Iolaus, Hercules strikes a deal with Hades - until sunset to defeat the new Enforcer in exchange for Iolaus' life, and has an unlikely companion - the original Enforcer.

Hercules has a nasty surprise for his birthday when Xena's mortal foe Callisto makes a deal with Hera to escape the afterlife and drug Herc's family, in a plot to kill the half-god in return for her freedom.

Hercules' good deeds landed him on trial when Kazankis, a Hercules impersonator, was killed. Charged with manslaughter, sedition and undermining the authority of the gods, Hercules pleaded innocent on all counts. But Spencius, the government prosecutor, showed how Hercules' acts of heroism caused Kazankis and others to emulate his actions, putting themselves and their families at risk. Although Hercules began to doubt himself, he told the court that society needs heroes who are not afraid to risk their lives for others. The case was ultimately dismissed, and Hercules was freed.

When they were teenagers, Hercules, Iolaus and Jason banded together to kill the Ghidra, one of Hera's deadly pets. On their journey they met the beautiful young Medea, who decided to join their quest. Soon a love triangle developed in which Medea fell for Hercules while Jason was smitten with Medea. Their jealousies temporarily drove the friends apart, which was Hera's plan all along. But Medea wanted no part of Hera when the angry goddess struck down Jason. Medea healed Jason with her own powers and helped the three friends defeat the hideous, two-headed Ghidra in its lair.

Discord shot Hercules with Artemis' bow, turning him into a pig. Then she sent the hunter Colchis after Hercules, but the pig jumped from Iolaus' arms and ran off. After a butcher caught him and threw him into a meat wagon, hercules was befriended by a female pig, Katherine. Autolycus and Iolaus rescued the two pigs from a slaughterhouse, where hercules communicated with his friends through Fleevio the parrot. Retreating to Alcmene's home, they eventually got the drop on Discord. Iolaus shot the mischievous goddess with Artemis' bow, turning her into a chicken, and Hercules returned to normal.

As Alcmene's health failed, Hercules recalled the time years ago when the Parthans invaded Caylan territory. Young Hercules, Jason and Iolaus joined King Eteocles and fought bravely to repel the invaders, but the King was killed. Many more died before Hercules and Jason were able to make an offer of peace, asking King Stavros to share the disputed land with the Caylans. Stavros was impressed by their bravery and agreed ending the conflict. Back in the present , Alcmene passed away and was buried by hercules and his friends. Suddenly his father, Zeus, confronted an angry Hercules.

Upon Alcmene's death, Zeus asked Hercules to join him in ruling the gods of Olympus. Hercules, still bitter toward his father, couldn't decide. He recalled meeting Apollo, his half-brother, years ago. Apollo gave him ambrosia, which transformed him into a full god. But Zeus chastised his son, saying he was never destined for full godhood. Chagrined, Hercules relinquished his new powers but still fought Apollo to a draw. he then saved young Ariadne from Apollo's treachery. This recollection resolved Hercules' indecision: He agreed to join Zeus on Mount Olympus, where he could do the most good for mankind.

While Iolaus paid a visit to his mother, Hercules explored Olympus. He was hurt to learn the real reason his father had brought him there: Zeus needed protection from Hera and the other gods, who were conspiring against him. But Hercules couldn't turn his back on his father. Then Zeus allowed Hera to rip away his godhood in order to save Alcmene's spirit from eternal hell. Hercules went to the dark side of Olympus, where he overcame Apollo and Hera in battle. Zeus' godhood was restored, Alcmene returned to the Elysian Fields, and Hercules became a half-mortal again.

Hercules and his friends followed the demon Dahak to Corinth, where Dahak -- in Iolaus' body -- had set himself up as the people's savior. He wanted to return the world to a time when the Titans ruled. Hercules and Zarathustra, a man who resisted Dahak's teachings, found the Stone of Creation and joined Nebula, Morrigan and Jason at the Dark One's fortress. Hercules used the stone to harness the light of dawn. The light became metallic and bound Dahak to his own altar. Hercules then prepared to perform an exorcism that would allow Iolaus to rest in peace.

Dahak, chained to the altar in the body of Ioalus, hatched a plan to kill Ares, which would give him the power to break his bonds. Meanwhile, the demon showed Hercules how he had seduced Iolaus at the moment of death. Apppearing as Hercules, Dahak promised Iolaus the power to set everything right in the world. With time running out, Hercules was sucked into the spiritual world, where he found the real Iolaus. The two friends fought side-by-side once more, sending Dahak into a fiery chasm. Then they siad good-bye, and Iolaus disappeared into a shaft of light.

Havisha, a former priestess of the oracle of Cyprus, and her boyfriend Drayus were killed by thugs on the night he proposed to her. Havisha rose from the dead on a mission of vengeance. After killing the men who murdered her, she attacked the Oracle. Hercules arrived just in time convince Havisha to stop the killing. She departed with Drayus' spirit. The Oracle, meanwhile, gave up her job because in saving her, Hercules had defied the fate she foresaw. Morrigan, who had accompanied Hercules, departed for her own people, but the couple knew they would always have Cyprus.

Hercules and Jason arrived at Cheiron's academy to find things greatly changed. The youths were out of control, and the headmaster left the school in Hercules' hands. Zylus, an upperclassman, had a secret plan to take over the school. When Hercules discovered Zylus and his friends were the masked attackers he had fought off earlier, he expelled the group. Zylus tried to burn down the school, but was no match for Hercules. After the fight, Hercules named Jason the academy's new headmaster, and Lilith -- Jason's first love -- promised to visit often.