Eurydice's Four Episodes of Young Hercules
Eurydice appeared in only four episodes of a television show that aired for just a single season, as yet another love interest for Young Hercules. She, however, was the one he truly loved (in my opinion) but they were unable to be together.
She first appeared in the episode "The Lure of the Lyre" as a Bacchae, a female follower of the god Bacchus. As a Bacchae, it was her job to recruit others to join. Hercules, when brought before the god by Orpheus, became her target. When Hercules found himself fighting Bacchus for another friend's soul, Eurydice and Orpheus switched sides to join with Hercules against their former master. Leaving Bacchus's cave, supposedly forever, Eury and Orpheus walked away from both their old lives and their new friends.
The next episode, "Fame," found Orpheus, Eurydice and their band performing at Kora's, the inn and restaurant near the Academy. Eurydice was no longer a Bacchae, as Orpheus had bought her freedom by agreeing to continue to recruit for the god. Eury, of course, had no idea of the true nature of the deal and thought they were done with Bacchus forever. Hercules learned of it, convinced Eury that Orpheus's lyre was enchanted by Bacchus, and together, they made Orpheus stop performing. Again, Eury chose to stay with Orpheus, as she was unaware of what a jerk he was and believed he had gotten rid of the enchanted lyre.
Some time later, Hercules and Iolaus happen upon the pair in a marketplace in the episode "Lyre, Liar." Much to everyone's surprise, a pair of Bacchae have tracked them down. Eurydice is shocked to discover that Orpheus still had the lyre, and confronts him. Finally seeing his true nature, she stalks off, lyre in hand, leaving Hercules and Iolaus with him. Eury returns the lyre to Bacchus, only to learn that the three guys she left in the marketplace have been captured by him. In a bargain for their lives, she agrees to marry the god, as she has always been his favorite. During the wedding, Hercules refuses to accept it and starts a fight, which causes a fire. Running from the fire, Hercules and Eury run into Bacchus, who renews the fight. In the middle of it, Eury deflects a blow meant for Hercules. She dies in his arms as Bacchus slinks away, vowing to get Hercules back for this loss some indistinct time in the future.
"A Lady in Hades" opens with Hercules still moping about Eurydice's death. Worried about the state of her soul, as all former Bacchae are usually stuck in Tartarus, he and Jason journey to the Underworld to plead her case. When they arrive, after much bickering whether or not they can be there while alive, they are just in time to save Eury from being sent down into Tartarus. In an attempt to secure the Elysian Fields for her, Hercules negotiates with the god Hades. After some talk and a brief stop in the Elysian Fields, Herc and Eury each try to exchange their immortal souls so that the other can have a better life. Hades realizes that there is such a thing as self sacrifice for another, and grants Eury the Elysian Fields. Hercules and Jason return to the mortal world, knowing Eury will be happy.
In a nutshell, Hercules fell for Eury when they first met when she was still a Bacchae. Eury, however, didn't feel she could be with Hercules because she felt that Orpheus had sacrificed so much for her that she couldn't just leave him. By the time she learned that he hadn't sacrificed squat, it was too late for her to have a life with Hercules. After her death, Hercules still couldn't forget her and journeyed to the Underworld to ensure that her soul was in Paradise, as she deserved. She was Hercules's true love.