Battlestar Galactica is an American science fiction television series that began with a two-part miniseries in 2003 and ran for four seasons between 2005 and 2009. Developed by David Eick and Ronald D. Moore, it was a re-imagining of the original Battlestar Galactica series created by Glen A. Larson which ran from 1978 to 1979. The series was generally well-received by viewers, but did earn itself its share of detractors, particularly those who were fans of the original series who felt that the revival series represented too drastic a departure from the show that they were familiar with. All episodes of Battlestar Galactica have been collected on DVD and Blu-ray format. The series took place some forty years after a fictional event known as the Cylon War. In the continuity of the series, humans from the Twelve Colonies of Kobol created the robotic Cylons who eventually rebelled. Forty years later, the Cylons evolved, creating humanoid versions of themselves which were nearly indistinguisible from humans. Twelve models of humanoid Cylons conspired to launch a massive nuclear attack against the Twelve Colonies, all but destroying each of their principal worlds. The survivors sought refuge among a fleet of civilian ships, led by the last military vessel, the Battlestar Galactica. Commander William Adama, working alongside the newly elected President of the Colonies, Laura Roslin, fled from the Cylons and embarked upon a long journey across space hoping to build a new life for themselves on a mythical thirteenth colony - a world known as Earth.