Battlestar Galactica - Season 1 Episode 2

President Roslin arrives on Galactica as Boomer's Cylon side asserts itself, forcing her to sabotage Galactica's water supply against her will. A series of explosions leads to the loss of 60% of the water reserves and Commander Adama is compelled to introduce rationing and begin a search of nearby planetary systems for any H20 deposits.