You probably know that City on the Edge of Forever is one of the best Star Trek episodes ever produced. But did you know it was based on an award winning Harlan Ellison teleplay, and that he spent 30 years complaining about how Gene Roddenberry ruined it before finally releasing the original in print?
Source: Kotaku – The Teleplay That Inspired Star Trek’s Greatest Episode (Plus a Lot of Angst) Is Just On Kindle