It would be flat-out wrong to claim Babylon 5 was the first TV sci-fi show to implement season-long story arcs, since Buffy: The Vampire Slayer was doing the same thing at the same time. Though, in terms of science fiction show having such detailed and consistent mythology, B5 was groundbreaking. Uncommonly, show creator and producer creator J. Michael Straczynski wrote 92 of the 110 teleplays for Babylon 5’s five year-run. To put this in perspective: Joss Whedon wrote 23 teleplays of 144 episodes of Buffy. Showrunner of Battlestar Galatica Ron Moore is only credited with 13 teleplays of 73 episodes. Now, this isn’t to say B5 is better than Buffy or BSG or that JMS inherently works harder than Whedon or Moore or anything like that. Obviously, Whedon and Moore were heavily involved in all aspects of their respective shows, just as JMS was with B5. The relevant thing here is that there was no “writer’s room” on B5, which we can’t imagine when we think of TV now. I mean, what if Steven Moffat wrote all 13 episodes of every season of Doctor Who? The chances of plot arcs making more sense and being more consistent would probably be much higher, right?