"Differences" Between Humans and Cylons
1. Cylons experience love.
Throughout the series, various cylons fall in love with humans and vice versa. For example, a major plot line of the story consists of a Cylon named “Number Eight” whose various copies have two romantic and sexual relationships with the human, Karl “Helo” Agathon and the cylon, Chief Galen Tyrol.
2. Cylons can reproduce with humans.
Even though cylons can make infinate copies of themselves, they do not believe these copies are a form of reproduction. Instead, throughout the series it is revealed that the cylons have experimented in an attempt to perform biological reproduction through procreation with humans. As a result of these experiments, Number Eight’s copy, called Athena, is impregnated by the human Karl “Helo” Agathon, resulting in the birth of their daughter Hera Agathon who is the first half cylon half human hybrid.3. Cylons are religious.
In Battlestar Galactica, religion is a central theme to the main plot. The humans practice a polytheistic religion where they worship The Lords of Kobol, who consist of Gods and Goddesses with the same names as the Greek Gods and Goddesses.
Unlike the humans, the cylons practice a monotheistic religion and follow "The One True God". We learn of these beliefs mostly through the cylon named Number Six. She tries to evangelize another character named Dr. Baltar as early as episode one. Number Six discusses themes of sin, redemption, and eternal love throughout the series with Dr. Baltar, eventually convincing him of the existence of The One True God.
4. Cylons rebel against Cylons.
Throughout the series, the humanoid cylons begin to rebel against one another. Their rebellion is exemplified within this scene, as Six and Eight give the humans tactful information in an attempt to find the mythical planet Earth.