Battlestar Galactica is an American science fiction media franchise created by Glen A. Larson. The franchise began with the original television series in 1978 featuring Lorne Greene, Richard Hatch, Dirk Benedict and Terry Carter, and was later followed by a short-run sequel series (Galactica 1980).
In a distant part of the universe, a human civilization has extended to a group of planets known as the Twelve Colonies, to which they have migrated from their ancestral homeworld of Kobol. The Twelve Colonies have been engaged in a lengthy war with a cybernetic race known as the Cylons, whose goal is the extermination of the human race. The Cylons offer peace to the humans, which proves to be a ruse. With the aid of a human named Baltar, the Cylons carry out a massive attack on 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 virtually destroy their populations.
Scattered survivors flee into outer space aboard a ragtag array of available spaceships. Of the entire Colonial battle fleet, only the Battlestar Galactica, a gigantic battleship and spacecraft carrier, appears to have survived the Cylon attack. 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. [Wikipedia]
“Their very existence menaced by a strange civilization.”
Between 1978 and 1981, episodes were edited into three feature-length films. The second film, Mission Galactica: The Cylon Attack, was a merger of the episodes “The Living Legend“ and “Fire In Space“, which also differed from the broadcast versions, omitting several scenes from both episodes. In 1979, it was released theatrically in continental Europe and Japan, and in the UK and Australia in 1980. [Wikipedia]
See the opening credits on the DotwinMA YouTube Channel.