Decimated by a Cylon attack, the last surviving members of the human race escape their ruined planet and head for sanctuary on the planet Earth. Travelling through space on the Battlestar Galactica, the survivors make a detour to the planet Carillon in order to stock up on supplies. But Carillon, like much of the rest of the universe, is in the grip of the evil Cylon aggressors, so our heroes must make plans for a daring secret mission. Lorne Greene, Richard Hatch and Dirk Benedict star.

In the Seventh Millennia of recorded history, the Battlestar Galactica roams the vast wilderness that is space. The robotic Cylon Alliance has destroyed the Twelve Worlds of Man and the Colonial defences have been wiped-out. Only the Battlestar fleet remains.

With no hope of survival against overwhelming odds, a handful of Colonials make a desperate bid for freedom on the Battlestar Galactica. But Baltar, the leader of the victorious Cylons is determined to finish his mission of destruction.

Under the command of Adama, the intrepid crew of the Galactica lead the Colonial survivors through battles with enemies old and new, tackle internal strife and starvation, while always fighting to outmanoeuvre Baltar and the pursuing Cylon forces.

And all the time Galactica is heading deeper and deeper into space, searching for the Thirteenth Tribe of Man "on a shining planet known as Earth".