Megara's whole, "Then read my lips! Forget it." Keep in mind, she's saying this to the Lord of the Dead...and she's still his slave. THAT takes guts.
"That's Phil's boy!"
The titans' defeat. Herc grabbed a freaking tornado and swing it around to suck the rest the titans in before throwing them into space. It wasn't just a regular tornado he grabbed; it was the wind titan himself!
"Gospel Truth" was just epic! The whole story telling song was awesome!
Starting right from the beginning, when the Muses step in and steal narration duties from none other than Charlton Heston:
Calliope: We'll take it from here, darling.
Narrator: You go, girl.
Hercules beat the Cyclops... without his godly powers.
The townspeople who once mocked Hercules now have total faith that he will come to save them. He does.
Megara pushing Hercules out of the way from the falling pillar. Meg said it best...
Meg: People do crazy things, when they're in love.
Hercules' final rescue of Meg. From the moment Phil passes off Meg's death as "something you just can't change" and Herc retorts, "Yes I can", you know he's got something epic planned. The guy stormed the underworld and nearly sacrificed even the human life he had, let alone any chance of an immortal life, to save her.
Heck, he managed to shock the Fates. You know, the old ladies who know everything. The shocked look on Atropos' face when she fails to cut his thread says it all.