How to watch Battlestar Galactica in orderBefore we get into the nitty gritty, here's a brief overview of the best Battlestar Galactica watch order. Battlestar Galactica season 2 episode 18-20Finish off the second season. Battlestar Galactica Season 4.5 or The Final SeasonStart off by watching Sometimes a Great Notion, episode 11 in season 4. Battlestar Galactica season 4 episodes 12-15Return to season four, watching up to episode 15. It was released after the show, but is better watched here in the Battlestar Galactica chronology.