Battlestar Galactica

Battlestar Galactica (often abbreviated BSG) is an American sci-fi franchise created by. It began with the which aired for 24 episodes in the 1978-79 television season before being cancelled. A write-in campaign brought the show back as , a sequel series which was set thirty years after the original and featured an almost entirely new cast, with the only returnees being as Commander Adama and  as Boomer (previously a lieutenant, now colonel and second-in-command). The series was not well received and aired for only ten episodes in 1980. The 1978 and 1980 series also gave rise to several films and TV movies (compiled from television episodes), a series of novels adapted from television episodes, and several comic book series. In addition,, who played Captain Apollo in the 1978 series, wrote a series of original Battlestar Galactica novels which were published in the mid-1990s to mid-2000s.

In the 2000s, Battlestar Galactica returned to television as a re-imagined series, beginning with a which aired in 2003 and continuing with a  which aired from 2004 to 2009. The re-imagined series has also spawned several TV movies, comic book series, novels, web series, and a prequel series, , which aired in 2010. The re-imagined series was critically acclaimed and was noted for changing the backstories and even genders of characters from the 1978 series, with the highest-profile change being that Lieutenant Starbuck, who had been male in the 1978 series, was female in the re-imagined series.

The common premise to both the 1970s and 2000s series is that human beings are all but wiped out in a massive sneak attack by a cybernetic race called the Cylons, whose goal is the extermination of all humanity. Survivors of the attack flee in spaceships, gathering in a fleet protected by the eponymous, the sole surviving military capital ship. The plotline in both series revolves around the fleet continuing to battle the Cylons and encountering other dangers as it searches for a new homeworld for humanity.

Battlestar Galactica has been referenced several times in the Simpsons universe, in television episodes, comic stories and other media.