Official SciFi Channel synopsis
The Cylons were created by the people of the Twelve Colonies. Intelligent robots, they were used as slaves and soldiers to fight humanity's wars. But the Cylons became sentient and they rebelled. Man and machine fought to a bloody stalemate, then the Cylons withdrew to a remote region of space.

A truce between the Twelve Colonies and the Cylons lasted for 40 tense and silent years. Each year, on the anniversary of the treaty-signing, humanity sent an envoy to the neutral ground of Armistice Station to meet with a Cylon envoy. For 39 years, no Cylon envoy came.

Then, on the 40th anniversary, a stunning blonde — a Cylon in human form — met the human envoy … moments before the Cylons vaporized the station and launched a genocidal attack on the Twelve Colonies.

In one devastating day, billions of human lives were consumed by nuclear fires. Only those souls fortunate enough to be aboard starships were able to band together and escape and flee into deep space, led by the sole surviving Colonial warship, the battlestar Galactica.

The Galactica and its crew seemed to be unlikely saviors for humanity's fewer than 50,000 desperate survivors. The ship was old and had been about to be decommissioned and turned into a museum when the Cylon attack occurred. In the aftermath its commanding officer, William Adama, found himself responsible for safeguarding the last remnants of the human race.

Meanwhile, the annihilation of the Colonial government on Caprica resulted in the succession of Laura Roslin, the Secretary of Education, to the presidency. Driven by prophetic visions and political necessity, she set the fleet upon a quest that will take it into the farthest reaches of unexplored space … in search of the mythical, lost "13th colony" — Earth.

The Colonies seem to worship a pantheon of Gods, which resembles the Greek pantheon of myth. Artemis, Apollo, Zeus and others have been mentioned -- and the religious literature seems to suggest that they once walked among humanity on Kobol. As another reversal of viewer expectations, it's the Cylons, the "bad guys," who have a monotheistic religion, and worship a God whose qualities -- and words -- seem to bring him closer to the conventional Judeo-Christian image of God.

Season 3
3-1 "Occupation" (10.06.06)
3-2 "Precipice" (10.06.06)
3-3 "Exodus, Part 1" (10.13.06)
3-4 "Exodus, Part 2" (10.20.06)
3-5 "Collaborators" (10.27.06)
3-6 "Torn" (11.03.06)
3-7 "A Measure of Salvation" (11.10.06)
3-8 "Hero" (11.17.06)
3-9 "Unfinished Business" (12.01.06)
3-10 "The Passage" (12.08.06)
3-11 "The Eye of Jupiter" (12.15.06)
3-12 "Rapture" (01.21.07)
3-13 "Taking a Break from All Your Worries" (01.28.07)
3-14 "The Woman King" (02.11.07)
3-15 "A Day in the Life" (02.18.07)
3-16 "Dirty Hands" (02.25.07)
3-17 "Maelstrom" (03.04.07)
3-18 "The Son Also Rises" (03.11.07)
3-19 "Crossroads, Part 1" (03.18.07)
3-20 "Crossroads, Part 2" (03.25.07)

Season 4
4-1 He That Believeth In Me (4.4.08)
4-2 Six Of One (4.11.08)
4-3 That Ties That Bind (4.18.08)
4-4 Escape Velocity (4.25.08)
4-5 The Road Less Traveled (5.2.08)
4-6 Faith (5.9.08)
4-7 Guess What’s Coming To Dinner? (5.16.08)
4-8 Sine Qua Non (5.30.08)

Admiral William Adama (Edward James Olmos)
President Laura Roslin (Mary McDonnell)
Captain Kara Thrace "Starbuck" (Katee Sackhoff)
Captain Lee Adama "Apollo" (Jamie Bamber)
Dr. Gaius Baltar (James Callis)
Six (Tricia Helfer)
Lt. Sharon Valerii (Grace Park)
Colonel Saul Tigh (Michael Hogan)
Chief Petty Officer Galen Tyrol (Aaron Douglass)
Lt. Karl Agathon "Helo" (Tahmoh Penikett)
Samuel T. Anders (Michael Trucco)
Felix Gaeta (Alessandro Juliani)
Anastasia Dualla (Kandyse McClure)
Cally Tyrol (Nicki Clyne)
Tory Foster (Rekha Sharma)
D'Anna Biers (Lucy Lawless)
Tom Zarek (Richard Hatch)
Brother Cavil (Dean Stockwell)
Leoben Conoy (Callum Keith Rennie)
Aaron Doral (Matthew Bennett)

Who Are All These Women? Where are Starbuck and Boomer? Among the many other radical revisions in the "reimagined" version of the show is the reinterpretation of these two regular characters from the original series. It has been noted that turning Starbuck and Boomer into women was more troubling to fans of the original show than was turning Boomer into an evil killer robot. Draw your own conclusions.