The Colonial Viper is a fictional spacecraft in the Battlestar Galactica science-fiction franchise. It is the primary fighter spacecraft type used by the human protagonists in this fictional universe. Appearing in both the 1978 original series and the 2003 reimagined series, as well as various derivative works, the single-pilot spacecraft are carried aboard Battlestar Galactica and are the humans' main tools of defense against the fictional universe's antagonists - the cybernetic Cylon race.