Hercules: The Legendary Journeys - Season 2 Episode 21 -

In the town of Corinth, Hercules' mother, Alcmene, prepared to marry King Jason. The marriage of the king to commoner meant Jason had to give up his throne, so he chose Hercules to succeed him. However, Hercules declined, so Jason sent for his second choice, Hercules' brother Iphicles. This enraged chief regent Patronius, who had his own dreams of power. Hera's mysterious Blue Priest summoned Perfidia, a terrible sea serpent, to attack the wedding party. Jason's Argonauts fought valiantly, but Perfidia swallowed Hercules and Jason. The two men eventually destroyed the creature and the wedding festivities continued.