Hercules comes from Greece to Ravenna, Italy, because a friend from childhood days has sent for him: Hercules should help the Roman Emperor who is in danger because of an intrigue lead by the leader of the pretorian guards.

Ulysses offends the gods so they send Hercules to capture him and bring him to them.

Gordon Scott plays Glaucus, the prince of Tiryns, a powerful warrior who goes undercover in Mycenae to infiltrate the evil cult of Moloch, which is exacting tribute from neighboring kingdoms in the form of attractive young hostages, both male and female. Calling himself "Hercules," Glaucus defeats Mycenae's champions and gains the favor of the voluptuous Queen Demetra (Rosalba Neri) whose son, covered in a dog's head mask, has been raised as the living embodiment of the dark god Moloch and receives sacrifices in his sprawling underground grotto.

Hercules goes to Babylon to rescue the Queen of the Hellenes and free the people of Babylon from slavery.

Hercules, after sailing global waters is eventually shipwrecked in South America. After losing his Greek shipmates, Hercules is enlisted to overthrow a tyrannical king int he land of the Incas. Featuring scenic views of the mountains of the Andes.

Two boxing promoters travel via time machine back to the days of Hercules, who must save them from Genghis Khan and the Mongol Horde.