Tigh has to work with Lee to defeat a Cylon boarding party that threatens to take over Galactica and destroy the fleet.

With Adama out of action, Colonel Tigh takes his position as commander of the Galactica. Boomer is in jail, and the cat’s out of the bag – she’s a Cylon.

Clark faces off against three Belle Reve prisoners who plan to force him to help break into the sanitarium’s mysterious “Level Three.”