Battlestar Galactica (2003)

After a 40-year armistice in a war between the Twelve Colonies of Kobol (the homeworlds populated by humans) and the Cylons (human-created robots), the Cylons launch a surprise nuclear attack intended to exterminate the human race. Virtually all of the population of the Twelve Colonies is wiped out. Most of the Colonial military is either rendered ineffective or destroyed due to malware in the military computer network that renders it vulnerable to cyber attack. The malware was introduced by Number Six, a Cylon in the form of a human woman, who seduced the famous scientist Dr. Gaius Baltar and exploited their relationship to gain access codes under the cover of an insider contract bid.

The Battlestar Galactica, a hybrid battleship/aircraft carrier in space that fought in the earlier war, is in the final stages of being decommissioned and converted to a museum when the attack occurs. During her decades of colonial service the Galactica’s computer systems had never been networked so the Galactica is unaffected by the Cylon sabotage. Its commander, William Adama, assumes command of the few remaining elements of the human fleet. He heads for the Ragnar Anchorage, a military armory station where the Galactica can resupply itself with weaponry and essential supplies.