17 episodes, but several of them were two part stories which means you had 23 hours of weekly programming which translates to a full season. And check the Nielsen ratings sometime and you'll find it finished in the Top #25 that season and would have been higher if not for some pre-emptions and early repeats in the spring. (And drew better numbers than Star Trek ever did or any other network TV sci-fi show). Galactica was cancelled not because of lack of popularity but because of ABC's obsession with cutting corners. "Galactica 1980" was their cop-out way of acknowledging first that they had goofed in cancelling the show, but at the same time still tried to have it both ways by bringing it back as a cheap shell of its former self. That's the kind of info that a Galactica fan usually needs to set the record straight on. I can just picture now the people saying that if Star Trek had been done the same way Moore altered Galactica in the late 70s how a lot of others would have said "Star Trek was cool for the late 60s but you couldn't revive the original version today."