The screenwriters do not seem to take this story seriously;neither does Giuliano Gemma ,who dyed his hair in blond (?),and whose dynamism and good humor save the movie from absolute tedium.The writers cash in on all sides,from Oedipus's curse to the Cyclop;we even catch a glimpse of Prometheus (ouch!my liver!) and the gorgon in a cock and bull story.The rest of the cast includes Italian Beauty Antonella Lualdi ,with a hideous hairdo and Jacqueline Sassard,who disappears from the screens after Chabrol's "les Biches " -she remains one of the French cinema biggest mysteries:what happened?some even said ,without any evidence,that she was dead;see for that matter the site "Etoiles Filantes"-and who is very good-looking (and good natured in the film,for she falls for the hero,in spite of his macho words about marriage).Serge Nubret ,who plays the dumb gladiator, was a famous body builder and he passed away recently.
If you do not want to think too hard.....