as perseus leaves the temple, calibos appears and stabs io to death. as perseus and calibos fight, he accepts he is zeus's son and stabs calibos with the olympian sword, turning him back into a human. the dying calibos urges perseus not to become one of the gods. with her final breath, io urges perseus to save the people of argos and andromeda. he rides back to argos on pegasus as the kraken is released. the people of argos seize andromeda and bind her to offer her as a sacrifice to the beast. meanwhile, hades reveals he feeds off man's fears rather than their faith or worship as zeus does, before then subduing his brother.