Season 2 Episode 2:
Valley of Darkness
Tigh has to work with Lee to defeat a Cylon boarding party that threatens to take over Galactica and destroy the fleet.
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About Battlestar Galactica:
When an old enemy, the Cylons, resurface and obliterate the 12 colonies, the crew of the aged Galactica protect a small civilian fleet - the last of humanity - as they journey toward the fabled 13th colony, Earth.