About two years ago, I found this Greek Mythology documentary called, "Clash of the Gods." It is a three disk series with ten episodes.
They feature Heracles by his Roman name, Hercules, in the second episode. As it was a while ago, I don't remember everything they said. What I do know is that they skipped his Sixth Labor, the Stymphalian Birds. They also talked about how the Hydra myth is preserved in the English word, "toxin," or, "toxic." And that one of the men must have been talking about how the myth of Heracles can from many mythologies or something. I definitively remember his saying, "Wait a minute, our strongman seems to be a little bit like your strong man."
So my question is this:
Is it possible that the Heracles myths are a compilation of stories from multiple cultures?