Hybrids
The Hybrids resemble human beings inside an immersion tank similar to a Cylon rebirthing tank. The Hybrids do not have a completely human body, but rather appear to be more like cyborgs, consisting of conduits and other connectors mated to, or in place of elements of their bodies. The Hybrid is not one of the "twelve models" of humanoid Cylon, but is a separate model that effectively further bridges the gap from primarily mechanical Centurion, to partially bio-mechanical Raider, to Hybrid, to humanoid Cylon. They are similar to the autonomous bio-mechanical pilots within Raiders, specially constructed as living computers that manage the autonomic functions of the basestar, including navigation and FTL jumps and climate control. The Hybrids are so integrated into the basestar's functionality that they are, for all practical purposes, the basestar itself.
In addition, the Hybrids continually speak what most of the humanoid Cylons consider to be gibberish, although there is some difference of opinion on this point. Many Cylons believe a hybrid's conscious mind is completely mad and the functions it performs are part of a deeper state of mind in connection with the ship. Caprica Six states that the Leoben Conoy models believe that every word a hybrid says is channeled from the Cylon god. A Hybrid is not allowed a vote in the Cylon democratic process by the humanoids, though it sometimes objects to the course of action they take, for example, leaving another basestar full of disease-infected Cylons to their fates.
In Battlestar Galactica: Razor another Hybrid is seen. This Hybrid, considered the First Hybrid in Cylon lore, was the result of experiments on humans during the first Cylon war and appears to be more coherent and prophetic than the other Hybrids. It went rogue as early as the end of the First War, and is protected by model 0005 Cylons called Guardians, who consider it their god. According to the humanoid Cylons, the very existence the First Hybrid and its Guardians was considered more of a legend. The Colonial Fleet accidentally clashes with the Guardians and manages to destroy them and First Hybrid along with its basestar. The First Hybrid has the appearance of an old man, whereas the standard Hybrids look like young women and are identical.
After being shot in the head and entering into a vegetative state, Samuel Anders is hooked up to a datastream and as a result develops Hybrid-like abilities, acting as the Hybrid for Galactica. When hooked up, he speaks and acts like a Hybrid and at one point is referred to as Galactica's Hybrid. This shows that apparently under special circumstances, normal Cylons, or at least Final Five Cylons, can become Hybrid-like beings.
In his Battlestar Galactica Podcast, Ronald Moore explained that the Hybrids should be considered an intermediate step between humanoid and mechanical model Cylons. They are not to be confused with the hybrid human/Cylon child Hera Agathon.
The Basestar Hybrids are played by Tiffany Lyndall-Knight. The First Hybrid is played by Campbell Lane.
Read more about this topic: Cylon (reimagining)