Battlestar Galactica is a franchise of science fiction television series and films. The franchise started with a 1978 TV show created by Glen A. Larson, followed by a sequel TV series, a line of book adaptations, original novels, comic books and video games. A reimagined miniseries developed by Ronald D. Moore and David Eick aired in 2003, continuing with a regular television series aired from 2004 to 2009 and a prequel series to be aired in 2010.

All of the Battlestar Galactica productions share the same premise: In a distant part of the universe, a civilization of humans lives on a series of planets known as the Twelve Colonies. In the past, the Colonies have been at war with a cybernetic race known as the Cylons. With the help of a human traitor named Baltar, the Cylons launch a sudden ambush on the Colonies, laying waste to the planets and devastating their populations. The human survivors flee into space aboard any spacecraft they can reach. Of all the Colonial Fleet, the Battlestar Galactica appears to be the only military capital ship that survived the attack. Under the leadership of famed military leader Commander Adama, the Battlestar Galactica and its crew take up the task of leading the small fugitive fleet of survivors into space in search of a fabled refuge known as Earth.