Perseus braves the treacherous underworld to rescue his father, Zeus, captured by his son, Ares, and brother Hades who unleash the ancient Titans upon the world.

Zeus: Hades, I am so sorry for having done this to you. Can you ever forgive me?
Hades: Why do you ask this?
Zeus: Because I forgive you, for this.
Helius: I've read you are a great disappointment.
Agenor: I am great. That's right.
[stuck in a labyrinth]
Perseus: We can't do this...
Agenor: [smacks him] Two days ago, I was locked up in a cell trying, I admit, to escape being the son of Poseidon! Look at me now: in the bowels of Tartarus, saving the universe. Just follow the Navigator.
[from trailer]
Zeus: You will learn someday that being half human, makes you stronger than a god.
Andromeda: We may not be gods. But we do what people say can't be done, we hope when there isn't any... whatever odds we face, we prevail.
Hephaestus: One last godly deed...
[takes on Ares]
Perseus: [chains the Chimera] What are you waiting for? Burn me!
Helius: It'll be nice to be back home. A fisherman doesn't sound so bad...
Perseus: There's no going home for us.
Zeus: Why are you doing this?
Hades: You want me to say it, brother? You want me to say I'm afraid? Doesn't that go without saying? When mortals die, their souls go somewhere - there's no place where gods go when they die! There's nothing, just oblivion...
Hades: All my power is spent. Who knows, I may be stronger without it...
Zeus: Thank you, my son.
Agenor: Oi, Helius! Come meet your uncle Navigator!
Hephaestus: You are Perseus, son of Zeus. 'Release the Kraken,' all of that.
Perseus: Just fix my body... and leave my soul to me.
[from trailer]
Hades: You're sweating like a human... next it will be tears.
Agenor: Don't give me the big speech.
Perseus: Yeah, I wasn't planning to.