But Hollywood also had a serious appetite for science fiction in the ‘90s, and imaginative TV projects surged onto the airwaves to satisfy discriminating audiences weaned on " Star Trek " and " Star Wars ." Check out our list of the 10 best sci-fi TV shows of the 1990s below and tell us it isn't just non-stop bangers. And who could forget "Star Trek" legend William Shatner's turn as the Big Giant Head! It also introduced iconic "Star Trek" characters like Quark, Garak, Kira, Odo, Bashir, O’Brien, Nog, and countless others into the canon. "DS9" is one of the best "Star Trek"-based shows and demands a close rewatch of its seven seasons in 2026!