As Sam Anders recovers from his head injury onboard the Galactica, he begins to remember events from ancient Earth. Meanwhile, the Final Cylon struggles with the fallout from the Final Five's former plans. One of the humanoid Cylons vows to get revenge for being created in the image of Man. Tyrol informs Admiral Adama about the extensive structural damage on the Galactica.
Season 4 Episode 15 of Battlestar Galactica resulted in a 0.00 rating in the 18-49 demographic.
In a distant part of the universe, a civilization of humans live on planets known as the Twelve Colonies. In the past, the Colonies have been at war with a cybernetic race known as the Cylons.
40 years after the first war the Cylons launch a devastating attack on the Colonies. The only military ship that survived the attack takes up the task of leading a small fugitive fleet of survivors into space in search of a fabled refuge known as Earth.