|Civilization Classification:||Type II - Influence over multiple stellar systems|
|Homeworld:||Old Earth, and Caprica, historically; currently, none|
Cylons are a race of robotic lifeforms, mostly opposed to humanity in the Battlestar Galactica franchise. They are fairly technologically advanced, likely constituting a lower Type II Civilization; their power and influence extends over multiple stellar systems.
In the original Battlestar Galactica, they were created by a lizardlike alien race, also known as Cylons; in the reimagining of the series, they were created by man but rebelled and left the Human colonies.
There are multiple types of cylon. The most common type is the Cylon Centurion, which are robotic soldiers, Cylon Raiders, which are a type of living (yet robotic) space fighter ships, and Human-form Cylons, also known as Skin-jobs, who appear human upon all sorts of examination; extremely close exams are required to determine the difference between a human and a human-form cylon. They imitate Humans so perfectly that they can't be detected living in Human society.