When the initial Cylon attack against the Twelve Colonies fails to achieve complete extermination of human life as planned, twin Number Ones (Cavils) embedded on Galactica and Caprica must improvise to destroy the human survivors.
The history and adventures of the Battlestar Pegasus, from shortly before the Cylon invasion to shortly after Lee Adama is made commander. The story is told through the eyes of and largely focuses on one particular member of Pegasus's crew, Kendra Shaw.
The first Cylon war has been raging for 10 years and a young Ensign William Adama joins the fleet. Disappointed not to be assigned to a fighter but to a freighter, his co-pilot also isn't too keen on having a rookie flying his aircraft as he has only a short time before he again becomes a civilian. Their cargo is a civilian scientist, but they no sooner leave than she has new orders for them and a new destination. Although she’s less than forthcoming about the details, Adama is keen—particularly as it involves going into Cylon controlled space. However, nothing is as it seems.
A compilation of Battlestar Galactica episodes 10–12 and 21, with alternate footage. Running low on fuel, the Battlestar Galactica receives the help of the supposedly lost Battlestar Pegasus which is taking the offensive with the Cylons.
A compilation of Battlestar Galactica episodes 1–3 and 7–9, with alternate footage. The Galactica and its ragtag fleet of ships finally arrive on Earth, only to discover that the planet is not prepared for the inevitable Cylon invasion.
A compilation of Battlestar Galactica episodes 1 and 5, with alternate footage. After the destruction of the Twelve Colonies of Mankind, the last major fighter carrier leads a makeshift fugitive fleet in a desperate search for the legendary planet Earth.
"Battlestar Galactica: The Second Coming" is a Proof of Concept for a possible Sequel from the television series "Battlestar Galactica".