I found this the most extraordinary story - of a Neolithic Man who lives for 15000 years.
The story is told by the man himself to his colleagues but they react with horror and fear, so he, at the end, pretends it isn't true.
He tells them an interesting piece of his history, when he met the Buddha and tried to teach the same ideas in the Middle East and was crucified for it (which was Holger Kersten's fabulous research on Jesus).
Anyway, worth a watch. And even if there's a whole 80s feel to the movie that makes it appear antiquated, it has a lot of references to modern research which make it a learning opportunity.