Fandom loves a milestone. Here’s one for you… as of this week Firefly has been off the air for as long as Star Trek had been when Star Trek: The Next Generation premiered. Well, okay, it depends on whether you count the three episodes that only aired in the UK, but either way… Firefly was cancelled a little over 18 years ago, which is as long as Trekkies waited between seeing Captains Kirk and Picard command the USS Enterprise on TV.