Voir Battlestar Galactica (Original), Season 1 - Episode 8

The giant Battlestar Galactica faces destruction when it's caught in between a crew of Cylons manning the most powerful weapon in the history of civilization and an ominous wave of Cylon-piloted batwing fighters. In "The Gun on Ice Planet Zero- Part I, the Galactica and her immigrant space fleet are pushed to the brink of destruction by the evil warriors of the Alliance. Unable to confront pursuing adversaries and threatened by a giant, mountain based laser on the frozen surface of the planet Arcta, Capt. Apollo must lead a dangerous band of prisoners into icy mountain warfare for a desperate search-and-destroy mission.