En route to Thebes for an important diplomatic mission, Hercules drinks from a magic spring and loses his memory. He spends most of the movie in the pleasure gardens of Queen Omphale of Lydia. While young Ulysses tries to help him regain his memory, political tensions escalate in Thebes, and Hercules' new wife Iole finds herself in mortal danger.
Steve Reeves
as Ercole (Hercules)
Sylva Koscina
as Iole, bride of Ercole
Sylvia Lopez
as Queen Onfale, of Lidia
Gabriele Antonini
as Ulisse, son of Laertes
Primo Carnera
as Anteo, the giant
Patrizia Della Rovere
as Penelope
Sergio Fantoni
as Eteocle
Fulvia Franco
as Anticlea
Carlo D'Angelo
as Creonte, High Priest of Thebes
Marisa Valenti
as Blond Slave Girl
Mimmo Palmara
as Polinice
Elda Tattoli
as Altmea - Mother of Ulisses' Girlfriend
