Portal:Cylons
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
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Introduction
It depends on how and from what series you view it. To our left we have our typical "toaster" Cylon Centurion from the original Battlestar Galactica. To our right we have a new and very different Cylon that takes the form of a human being from the Re-imagined Series. There still are big and intimidating Cylon Centurions kicking around, themselves new, but it's the humanoid models which are the biggest threat to the Fleet.