The Alternative Factor (Original Series) - The Secrets of Star Trek

Jekyll and Hyde? Jimmy Akin, Dom Bettinelli, and Fr. Cory Sticha discuss this Original Series story featuring Lazarus, a man obsessed with his alternate reality self who will go to any length to destroy him, and his doppelgänger who is willing to sacrifice his life for the universe.

https://starquest.fm/SST260