The Man from Earth

What if you found out your friend is 14,000 years old?

The Man from Earth is a 2007 American drama science fiction film written by Jerome Bixby and directed by Richard Schenkman. It stars David Lee Smith as John Oldman, the protagonist. The screenplay was conceived by Jerome Bixby in the early 1960s and completed on his deathbed in April 1998.[2] The film gained recognition in part for being widely distributed through Internet peer-to-peer networks, which raised its profile. The film was later adapted by Schenkman into a stage play of the same name.

The plot focuses on John Oldman, a departing university professor, who claims to be a Cro-Magnon (or Magdalenian caveman) who has secretly survived for more than 14,000 years. The entire film is set in and around Oldman's house during his farewell party and is composed almost entirely of dialogue. The plot advances through intellectual arguments between Oldman and his fellow faculty members. (From: https://en.wikipedia.org/wiki/The_Man_from_Earth)