The remnants of an ambushed space fleet, one huge mothership and 220 smaller vessels, undertake a new mission.
Apollo, Boomer and Starbuck seek supplies on a distant planet after finding the fleet's stores contaminated.
A mysterious disease strikes the fleet's fighter pilots after they investigate a Cylon base on an asteroid.
Despite the Galactica's efforts to escape, the Cylons continue to pursue them through the magnetic void.
Adama becomes concerned when Sire Uri (Ray Milland) authorizes much of the fleet population to visit Carillon.