I ran across the back end of that ages ago, but have never seen the entire film
It's interesting to compare the differences between "Requiem for Methuselah",
Man From Earth,
Highlander and say Robert Heinlein's Lazarus Long.
In "Requiem" Flint is a "collector" while also continuing to create new works after the great historical figures he had been. He is also somewhat god-like in the wealth and technology he has amassed, along with great knowledge and the intellect to use it. At the end of the episode we learn that Flint is not immortal, just very long-lived (since 3834 BC Terran), somehow sustained by unknown factors of the Earth environment.
In
Man From Earth John is
not a collector. He travels very light, keeping very little in the way of memorabilia. It is suggested that he has liquid assets, but lives like a common man, staying mostly invisible. He is skilled and learned, but not superhuman. He is surprisingly grounded for someone who has lived such a remarkable life (born around 12,000 BC Terran). By his own words, he is "not immortal," just long-lived. Like most of us, he remembers the extreme moments of his life, while describing the people and events as "turbulence." (Do not watch the sequel. Very bad, formulaic, and not written by Bixby.)
Highlander Connor Macleod (born 1518 AD Terran) is most definitely a collector. Although how he manages to keep a low profile with so much baggage is a mystery. His story is "Biblical," with various clues throughout the movie suggesting that he is one of the pieces in the game leading up to Armageddon. Without giving away anything for those who have not seen the movie, Macleod is also not immortal, but is potentially god-like for a short spell. (
Do not watch any of the sequels. This is yet another case where the original film stands on its own. The sequels do not have anything to offer, and serve only to tarnish the original.)
Lazarus Long, first appearing in Heinlein's novel
Methuselah's Children, is 23 centuries old by the beginning of the second book in which he appears. He lived to about 300 years old before his first "rejuvenation." So while Lazarus is not technically immortal, Dr. Hugo Pinero (see Heinlein's short story "Lifeline") left him with the conviction that he will not die. The intro of the second book (
Time Enough For Love) describes Laz as athletic with very fast reflexes. He is learned and crafty, but again not superhuman. He was born in 1912 AD Terran, and is an easy-come, easy-go collector of wealth and resources. It is noted in the first book when Lazarus is in his late 200s that the wealth of his own memory is starting to overwhelm him. (He might waste a morning looking for a book he was reading a century ago.) None of the other writers addressed this problem.