There's a one-hour documentary called "Chaos on the Bridge" which is all about the inception and first few years of Star Trek The Next Generation. It's a really fascinating look inside what was very nearly a trainwreck. Between Roddenberry being more than a little off the rails, and the sheer anarchy that ensued when nobody knew what to do, it's insane. One part talks about how the show had hired and fired over thirty writers just in the first two seasons.