After losing the war against the Cylon robots, the Battlestar Galactica crew quickly head toward the fabled 13th colony, Earth. Galactica Commander Adama and President Laura Roslin are facing the problems of waning supplies and crushed morale. Along the way they have to deal with the credible threat that Cylons may be aboard the ship.

The civil war amongst the Cylons escalates and Galactica's quest for Earth continues. Razor follows the crew of Battlestar Pegasus, led by Admiral Cane, prior to their meeting with Galactica; Galactica's fleet struggles to regroup and resume the search for Earth after the Cylons attack New Caprica.

On the day of James Kirk's birth, his father dies on his ship in a last stand against a mysterious alien vessel. He was searching for Ambassador Spock, who is a child on Vulcan, disdained by his neighbors for his half-human nature. Twenty years later, Kirk has grown into a young troublemaker. He is inspired by Capt. Christopher Pike to fulfill his potential in Starfleet, even though he annoys his instructors. Suddenly, there is an emergency on Vulcan...