Season One: 13-episodes
Season Two: 20-episodes
Webisodes: Ten "webisodes" called Battlestar Galactica: The Resistance were designed to focus on events that take place on New Caprica between seasons two and three
Season Three: 20-episodes
Razor Flashbacks: two-minute vignettes chronicling the rookie mission of young William Adama during the First Cylon War.The mini-episodes, collectively known as "Razor Flashbacks," serve as a backdrop leading up to the television movie, Battlestar Galactica: Razor
Season Four: 20-episodes