Battlestar Galactica (BSG) is an American military science fiction television series, and part of the Battlestar Galactica franchise. The show was developed by Ronald D. Moore and executive produced by Moore and David Eick as a re-imagining of the 1978 Battlestar Galactica television series created by Glen A. Larson. The pilot for the series first aired as a three-hour miniseries in December 2003 on the Sci-Fi Channel, which was then followed by four regular seasons, ending its run on March 20, 2009. The cast includes Edward James Olmos, Mary McDonnell, Katee Sackhoff, Jamie Bamber, James Callis, Tricia Helfer, and Grace Park.

Battlestar Galactica is an American science fiction media franchise created by Glen A. Larson. It began with the original television series in 1978, and was followed by a short-run sequel series, Galactica 1980, a line of book adaptations, original novels, comic books, a board game, and video games. A reimagined version aired as a two-part, three-hour miniseries developed by Ronald D. Moore and David Eick in 2003, followed by a 2004 television series, which aired until 2009. A prequel series, Caprica, aired in 2010.