The first ten episodes from the fourth series of the reimagined American sci-fi television series, where the pilots of the Galactica spacecraft battle against the evil Cylons, cyborg creatures that originally served mankind, but who now want humanity destroyed.

After losing the initial battles, and with all the colonies destroyed, mankind's last hope is to search for the fabled home planet of Earth.

In this series, Gaius Baltar (James Callis) gets religious over the Cylon god, Cally (Nicki Clyne) finds out some home truths about hubby Galen Tyrol (Aaron Douglas), and Lee Adama (Jamie Bamber) says goodbye to the Galactica.