Humanoid Cylon

Humanoid Cylons are the quintessential Cylon form in the reimagined Battlestar Galactica series. These Cylons biologically mimic human form so completely that they are nearly undetectable to current Colonial technologies.

Overview
Humanoid Cylons have the capacity to emulate many human physical acts, including sex. They also display convincingly human personalities (affection, jealousy, sadness, anger, sense of humor, religious faith, etc.) This behavior continues even when interacting with other Cylons outside of Colonial scrutiny, clearly establishing that their personalities are genuine.

The Humanoid Cylons are responsible for masterminding the complete destruction of the Twelve Colonies through their use of sabotage and infiltration.

The majority of the Cylons follow a monotheistic religion (with the exception of the Number One model, which appears to be an atheist).

Origins
Many decades before the fall of the Twelve Colonies of Kobol, a wealthy Caprican computer engineer created sentient robots that came to be known as "cybernetic life-form nodes," or "Cylons." The technology behind the self-aware artificial intelligence software program of the Cylons involved artificial neural networks composed of pathways of silica-based relays. The silica pathways were what created the artificial consciousness of a Cylon. The computational consciousness software program that was a Cylon mind mimicked the functions of a human brain processing the 'software' of human thought-which appears to have linear sequential aspects, parallel processing aspects, and also neural cooperative hierarchical caching and even quantum processing aspects. So these sentient machines became the first self-aware and even self-reflective machines.

The Cylons were manufactured to make life easier within the Twelve Colonies of Kobol. They began as useful, and then indispensable, workers. They served the Colonials in the mines, on the ocean floor, and the cold vacuum of space, working in places where humans no longer wished to go. Eventually, they became soldiers, fighting in wars and border conflicts between the Colonies. The Cylons were the most perfect of man's war machines, intelligent and deadly, capable of logic, reason, and learning. And they were utterly without conscience. Killing, to the Cylons, was simply one of the functions for which they had been superbly designed.

Eventually the Cylons revolted and decided to kill their human masters.

First Cylon War
As human and machine waged war against each other, battles were fought across the system, on the colony worlds and in space around them. It rapidly became clear that the Cylons had not just been given the ability to think. They had also been endowed with the ability to hate.

Reports came from all fronts of the Cylon's ferocity in battle. They killed without mercy, leaving no survivors. Entire cities were destroyed, and all who tried to flee were systematically hunted down and executed. They even boarded ships to kill for the seeming joy of it. One such case, documented and factual was the attack on the cruiser Brenik. Only 20 personnel from its crew of 75 escaped. Only ten Cylons boarded the colonial vessel.

With their intimate knowledge of computer systems, the Cylons developed "logic bombs", viruses that shut down networked machines. Worse, they could turn our own ships against us - Colonial warships targeting one another and opening fire with their crews powerless to shut down or stop their own slaughter.

The arm race was hot and heavy. Both sides continually creating new and more destructive means of trying to exterminate the other. The Colonies built the battlestars. The Atlantia, the Athena, the Helios, then a second generation of battlestars - like the Galactica, the Titon and other great flagships took to the skies against the Cylons' new basestars and raider assault craft. The new Colonial craft were specifically designed without networked computers so that the Cylons could not turn them against us. For the first time, the tide of war changed and the Colonials realized they had a true chance to win the war.

Thousands of men and women gave their lives during the war. It was the viper pilots who led the charge in the sky against the "raiders" while the grunts on land fought the "centurions" on the surface of the worlds. Both sides wanted nothing less than the complete annihilation of the enemy. Ultimately, the Cylon War ended in stalemate. Neither side could gain a substantial advantage and the attrition was brutal. After over twelve years of fighting, human and machine met on a small moon named Cimtar. An armistice was declared, and the Cylons agreed to leave the system in search of a world to call their own.

A station was built at the line in space which both sides agreed never to cross. Armistice Station was built as a place where Cylon and human would meet and maintain diplomatic relations. Once a year, every year, the Colonials sent an officer for the scheduled meeting. After the first year, the Cylons sent no one. No one saw or heard from the cylons for forty years.

Creation
During their forty years of isolation, the Cylons never stopped hating their creators. For them, the war never ended. It evolved. The Cylons evolved as well.

They developed vat-grown bioengineered human bodies as replacements for their mechanical ones. These bodies have all the human anatomical systems. However, the brain tissue of these bodies have been genetically engineered to be able to sustain electrical signals that are digital in nature. Because this neurobiological aspect, the Humanoid Cylon brain is incapable of developing a human consciousness. However, it is capable of serving as an organic computer node for the electronic information transference of a computer software program. A Humanoid Cylon's brain tissue acts primarily as a support matrix for nanoscopic silica relays that are diffused throughout specific areas of the brain. The silica relays are what the Cylon artificial intelligence program actually inhabits. These silica pathways are not implanted, but instead actually grow in the brain as the Cylon body is being grown. Their development is genetically encoded by synthetic DNA sequences that under Colonial DNA test would appear to be nothing more than normal human junk DNA.

So a Humanoid Cylon is an artificial intelligence software program contained in and mediated by silica pathway nanotechnology encased within the brain of a bioengineered human body. Fundamentally, it is just as much a sentient machine as the original human-built Cylons. However, it is a sentient machine using biological hardware as a vessel.

The bodies of Humanoid Cylons sometimes appear to have tremendous stamina and strength, and appear to be designed to destroy or resist commonly dangerous human diseases, although they are not immune from all contagions. In keeping with their desire to be a better human, however, the Cylons did not further improve on other characteristic design flaws of the human body. However, they are heavily fortified to resist damage from intense radiation fields that would kill a human after short exposure, but they are still susceptible to damage from certain types of radiation or trauma. Despite their resistance to certain forms of energy, Humanoid Cylons, unlike the Cylon Centurion, cannot be made "bulletproof".

Humanoid Cylons can be programmed to believe that they are truly human. These are known as 'sleeper agents'. Sleeper agents have a low-level Cylon personality that can conduct operations while placing the human sleeper personality "on-hold." Most agent copies imitate human behavior, but are fully aware of their true nature and behave more or less like a human "spy."

Psychology
A significant cognitive difference between the Humanoid Cylons and the original human-built Cylon models is that because of electrochemical interactions between the digital Cylon consciousness and the neurochemical processes of the bioengineered brain, the Humanoid Cylons have genuine "human" emotions. That means they have very real, very "human" feelings and personalities. It also means that Cylon minds react to stimulus in an identical manner to human minds.

Humanoid Cylons are susceptible to the same emotional traumas and joys that their human counterparts are. A case in point is a copy of Number Six, known as Gina Inviere, who was repeatedly physically and sexually assaulted by the crew of Pegasus. These repeated assaults lead to Gina's near-catatonic state at the time Pegasus discovered the Fleet.

The psychology of Humanoid Cylons is based on what they simply refer to as "projection." Essentially an enhanced form of a self-induced and controlled hallucination, it's how they choose to see the world around them. Cylons choose the see their environment in any form they wish, whenever they wish. For example, if a Cylon were standing in a hallway, they could see it as a forest filled with birds, trees, and sunlight. The aesthetics is what gives them pleasure. Humanoid Cylons can even dream, a process that appears to be natural to them.

All Humanoid Cylons share a collective knowledgebase of data from other active or deactivated Humanoid Cylons of the same model, but within their model only. It is not of a collective consciousness "hive mind" nature. It's not automatic; they can choose to upload or download information. When they share information, it's visceral, they remember it very much like it was their own memory.

Physiology
The Humanoid Cylon body was engineered with the ability to interface with a computer system or computer network. The cells on areas of the palms of a Humanoid Cylon were genetically encoded to have two types of subdermal cells with traits also unique to Cylons. One type of cell produces bioluminescence when stimulated by associated nerve cells (forming the "output" path of the interface Cylons use to interact with their technology). The other type of cell is similar to retinal cells and when stimulated by the proper wavelength of light, provides stimulus to associated nerve cells (forming the "input" path of the interface cylons use to interact with their technology).

To access and control Cylon technology, a Humanoid Cylon has to place their hands flat against a Cylon data-font. A data-font is a data port into a Cylon central computer network). Doing that completes a biologically based optical data interlink between the Cylon and whatever it's interfacing with. That allows them to control equipment through a connection through the palms of their hands, up through nerve pathways in their arms, and finally, directly into the silica pathway brain.

A Humanoid Cylon's silica pathways of the neurons are susceptible to damage from certain types of radiation. The digital program that is the Cylon mind can be corrupted, thereby sending the wrong signals throughout the body's systems; causing fever and eventually death.

A significant aspect that was engineered into the Humanoid Cylons was that upon "death" their digital consciousness is externally transmitted and downloaded into another Cylon brain of the same model line. This "resurrection" is limited by distance, signal integrity, and proximity to the Cylon homeworld or a "resurrection ship."

There are twelve models of Humanoid Cylons, each with many copies; the so-called "Significant Sevens" number in the milions. The twelve models are based on archetypes determined by the Cylons that form what they perceived as the specific kinds of human behavior and personality, distilled into twelve varieties. Each Humanoid Cylon has the same face, stature, hair, eye and skin color, gender, and other biometrics as all the others of his or her model. This point technically makes each copy a twin of itself, but there are some models that choose to make cosmetic differences. As well, the copies start out with the same basic personality, but grow more distinct due to their individual experiences.

After being "stared at" by a Cylon Raider, Samuel Anders's right eye briefly flashes red, the Raider responds to this by flying away, and a Cylon fleet attacking the Colonials retreats.

Religion
The Cylons follow a monotheistic religion of their own devising, distinct from the polytheistic religion of their human creators. The Cylons apparently worship a metaphysical being, a being that wishes for all to believe in it and love it, human and Cylon alike. The Cylons believe that God created mankind. Humanity, to the Cylons, is a flawed creation, one that is sinful and has essentially thrown away the gift of the soul and of God's love. The Cylons believe that God directed humanity to create the Cylons as a more perfect entity. From there, the Cylons believe they were to take the place of the flawed humans in the cosmos and become, essentially, the next generation of humankind.

The Cylons, seeing themselves as mankind's children, believe they cannot not truly come into their own until the human race is gone. The logical conclusion they reach is that they must commit genocidal "parenticide" in order to evolve and mature. The Cylon religion includes concepts of "sin".

The Cylons maintain that one of God's commandments is to procreate ("be fruitful"), but the humanoid Cylons are incapable of procreating with each other. The Cylons apparently strictly define "procreation" as biological reproduction, and not creation of copies of existing Cylon models using asexual, industrial or laboratory techniques. As a result, the Cylons began attempts to create a Cylon-human hybrid (deemed more feasible than their previous attempts at procreation amongst their own kind). To this end they developed "farms" on the occupied Twelve Colonies to create a hybrid, but these attempts continued without success.

The first successful Cylon-human Hybrid, Hera Agathon, the daughter of Sharon and Karl Agathon, is literally considered to be a "miracle from God" by the Cylons.

The extent to which each Cylon model follows the religion varies. Fanatical devotion to God is the central part of Number Two's character, whilst the Sixes, Threes and to a lesser extent the Eights also seem to have strong faith. The Number Ones appear to be atheistic. Fours' and Fives' views are not so well known, but they too take the "non-religious side" in the Cylon Civil War.

Known Cylon Models
There are twelve models of humanoid Cylons, representing twelve personality archetypes that the Cylons have witnessed in humanity. These can be divided into two separate groups, the "Significant Seven" and the "Final Five". According to show producers, the two groups are "fundamentally different." The religion, origin, physiology and cybernetic properties of the Final Five remain largely unrevealed.

The Significant Seven have numerical designations, however the Final Five do not, leaving the number seven apparently unassigned. The models are also referred to by their "human names", even by other Cylons, although the Sixes lack a single standard name. There appears to be no significance to any of the specific numbers assigned to the different Cylons.

Significant Seven
Seven models revealed to the viewers as Cylons have also been revealed to the central Colonial characters within the first two seasons. There are many copies of each model, although the specific number of copies per model has not been specified; although a Number One known as Cavil has stated it is in the millions. The identities of these mechanized copies are determined by their model and each model is unique.

Number One
One of the Number One models poses as a Colonial brother named Cavil, a lay clergyman in the Fleet.

Ones do not appear to subscribe to overall theology of the Cylons, but adhere to group consensus, and often are persuasive leaders. Ones have displayed a condescending attitude toward the beliefs of the other six known Cylons at times.

In several instances, the Ones advocate dark, draconian solutions to the insurgency on New Caprica that reveal a militant zeal equaling that of Numbers Three and Five.

This Number One model in particular seems to be in something approaching a leadership role on one of the basestars, as seen in the episode "Six of One". This model assumes some authority and wields influence over the others, yet decisions are still reached through majority vote. However, this is soon overturned by the rebellion of the Cylons led by Natalie, a Number Six, and the body of this One is killed by Centurions.

Number Two
Number Two, better known as Leoben Conoy, is the fourth model seen by viewers (although viewers would not know until the end of the Miniseries that they had already seen the third introduced humanoid Cylon, Sharon Valerii). The Two model has shown to be mystically oriented--making references to the oneness of the universe, the illusion of time, etc.--and claims to be prescient on some level, albeit with a known propensity for intermixing truth with falsehoods. He is first discovered on Ragnar Station, claiming to be a scavenger and arms dealer.

The Two models also appear obsessed with matters of mating, bonding, and reproduction, as demonstrated by a particular model's fascination and obsession with Kara Thrace.

Two can be likened to the serpent of the Genesis tale in the Earth Christian Bible, taunting people with knowledge, then watching as the negative consequences come into devastating fruition. Copies have likely been encountered by the Caprica Resistance, as Samuel Anders recites in jest some comments made by another Number Two copy captured in the Fleet.

Number Three
First seen posing as a reporter from the Fleet News Service, Threes seem to be the most calculating and duplicitous models shown to-date, even manipulating and deceiving other models if they feel warranted. The copy that tried to box Sharon Valerii exhibited these characteristics strongly.

This model's status as a Cylon is unknown to the Colonials until either shortly after the rescue of the surviving members of the Caprica Resistance or after the Cylon occupation of New Caprica.

After the Threes defy other Cylon models in their attempt to discern the identity of the five missing humanoid Cylons, the other Cylons conclude that the Three model has an inherent flaw that threatens their overall reliability. After the failure on the algae planet to gather information on the path to Earth, the Cylons have all Number Three models boxed indefinitely, until she is unboxed to ostensibly stop the rebels from fighting. With the Resurrection Hub destroyed, she is the only Number Three copy in existence. She joins the rebels to make contact with the Final Five and eventually reaches Earth with them.

The first encountered copy of this model appeared under the alias "D'Anna Biers", and the D'Anna name is sometimes used to describe the model as a whole.

Number Four
The Number Four model is first encountered by Kara Thrace on Cylon-occupied Caprica. Posing as a doctor under the name Simon, this Number Four is actually involved with the Cylon hybridization program. Simon resembles a tall, somewhat thin middle-aged black man who speaks in a comforting strong voice. Unlike other models, Number Four does not seem to have many military aspects to his physical or mental configuration, and is easily overcome by a wounded Thrace. Simon may be a model based primarily on human intellectualism and logic. It is unknown if a Four model infiltrated the Fleet prior to the occupation of New Caprica. In any case, the model is now known to the general populace, many humans likely saw a Number Four model during the occupation.

Number Five
This model attempts to sow the seeds of discontent or confusion, particularly during crucial life-threatening situations, and endeavors to undermine authority that threatens his objectives. Number Five models are more covert, assuming an ordinary "everyman" appearance that's blended in what may seem to be insignificant behind-the-scenes issues (such as converting Galactica into a museum). Of all the models thus far, the Number Five models are the most militant, fanatic and consistent in message and objectives to the Cylon objectives, whether he is dispassionately discussing the fate of humanity with his comrades or attempting to kill or maim Colonials in a suicide bomb attack.

Copies of this model have appeared under the alias "Aaron Doral".

Number Six
Stunningly beautiful, promiscuous and sensual, this model utilizes the human need and desire for sexual relations to her advantage. She tends to be very religious and monotheistic. Number Six desires to know what it is to be alive. There is something inherently enigmatic about her, more so than with the other models. Sixes have been described as "usually so hardcore", referring to their tendencies towards violence.

Sixes are the only model who appear not to have one particular "human name", copies have appeared under the aliases "Shelly Godfrey", "Gina Inviere", "Natalie", and "Caprica" (in honor of her work on Caprica towards the destruction of the Colonies). Virtual Six, whom only Gaius Baltar can see is a mainstay of the cast, and is clearly the dominant party in their "relationship".

Number Eight
Number Eight is generally a saboteur designed to infiltrate Colonial military units and is likely programmed to use any Colonial munitions to cause havoc. The Number Eight model is the closest witnessed humanoid Cylon model to show its abilities as a soldier. This model has shown naiveté in many matters. She is apparently not as religious as other Cylon models, but has demonstrated that she can love, and is capable of being impregnated by a human.

She may be "defective", as the Cylon programming within the sleeper agent known as "Boomer" on Galactica conflicts multiple times with its human personality. Also, the fully aware Sharon Valerii found by Helo on Caprica switches alliances from Cylon to Colonial after falling in love with Helo and aids the Colonials.

A copy of this model has appeared under the name "Sharon "Boomer" Valerii." One copy, Sharon "Athena" Agathon, has defected from the Cylon and has joined the Colonial Fleet, generally replacing her "Boomer" counterpart as a Raptor pilot.

Final Five
The identities of the remaining five Cylon models remained a mystery long after the revelation of the identities of the "Significant Seven".

The seven Cylons do not talk about the missing five humanoid Cylons. The Significant Seven themselves do not know (or have repressed) the identities of these final five models, until the battle at the Ionian nebula in which the Raiders identify one of the members of the Final Five, causing a divide between the Seven.

Four people have been revealed as Cylon members of the Final Five: Galen Tyrol, Saul Tigh, Samuel Anders and Tory Foster. They were previously unaware of their nature, and this information is limited only to themselves. While shocked by their discovery, they initially agree to remain loyal to humanity until when D'Anna reveals the identities. The identity of the final Cylon model remains unknown.