Revealing mistake: At the beginning when the ruler is making his speech, you can see his modern day fillings in his upper molars.
Revealing mistake: During the scene when Argos is being destroyed, a citizen falls backward due to the rushing waves and you can see a pair of black running shorts with white trim under his tunic.
Revealing mistake: When Calibos is speaking to Thetis' statue, as he screams "I demand justice", you can see the left horn on his head wiggling around, revealing a flimsy prop.
Revealing mistake: When the ruler of Argos is cursing his daughter prior to setting her adrift, we are treated to a couple of close ups where his modern dental fillings are beautifully displayed.
Revealing mistake: It's obvious the 3 blind witches have cloths covering their eyes.
Suggested correction: Yes, they do, but what does that have to do with them being actually blind and how is it a mistake? It's like real blind people wearing dark glasses.
No it is not, as the cloths should have been better camouflaged or better makeup. But forgiveness granted for a cult film of its time.