The Man from Earth - Wikipedia
I really enjoyed this film. It was written by Jerome Bixby who wrote a few of the old Twilight Zone episodes, and some early Trek, as well as co-writing 'The Fantastic Voyage' (which is another underrated film imo).
It's classed as Sci-Fi but it's just people sitting in a room having goodbye dinner and debating, essentially, but the topics and conversation are so well written.