Battlestar Galactica is an American science fiction franchise created by Glen A. Larson. The franchise began with the Battlestar Galactica TV series in 1978, and was followed by a brief sequel TV series in 1980, a line of book adaptations, original novels, comic books, a board game, and video games. The reimagined miniseries Battlestar Galactica, developed by Ronald D. Moore and David Eick, was first telecast in 2003, and this concept was continued with another Battlestar Galactica TV series telecast from 2004 to 2009. A prequel TV series, Caprica, began airing in 2010.
All Battlestar Galactica productions share the premise that in a distant part of our galaxy, a human civilization lives on a group of planets known as the Twelve Colonies, to which they have migrated from their ancestral homeworld of Kobol. The Twelve Colonies have warred for decades with a cybernetic race known as the Cylons, whose goal is the extermination of the human race.
The Cylon Empire offers peace to the humans, which proves a ruse. With the aid of a human traitor named Baltar, the Cylons carry out a massive attack on the home planets of the Twelve Colonies and on the Colonial Fleet of starships that protect them. These attacks devastate the Colonial Fleet, lay waste to the Colonies, and destroy their populations.
Scattered survivors flee into outer space aboard available spaceships. Of the entire Colonial battle fleet, only the Battlestar Galactica, a gigantic aircraft carrier of outer space, appears to have survived the Cylon conflagration. Months later, it is discovered that another Battlestar, the Pegasus, has also survived and fled into deep space under the command of Commander Cain (Admiral Cain in the reimagined series), carrying out months of hit-and-run attacks against Cylon bases and raiding them for necessary supplies.
Under the leadership of Commander Adama, the Galactica and the pilots of "Viper" fighters lead a fugitive fleet of survivors in search of the fabled thirteenth colony known as Earth.