As Season 4 begins. the last remnants of humanity continue their search for a new home.
Galactica's crew, rocked by Starbuck's sudden and mysterious return form the dead, attempts to make sense of the inexplicable. Meanwhile, four members of the fleet are still reeling from the revelation that they are Cylons and have been all along.
Battlestar Galactica is the saga of humanity's last remnants and their struggle to find a new home while fleeing from their deadly Cylon enemies.