Ten months ago, the sky exploded over the algae planet; Three saw God and went blind, and Galen recaptured Gaius for the Colonies after a half-season away with the faerie. Ellen laughs at Cavil, showing her these pictures, but his purpose is at least threefold: to show her what's happening and ask about her part in it -- which is nil, she even evokes the OTG to explain why Three saw and apologized to her in her last blinding vision, resulting directly in her second-to-last death, the second of Cavil's siblings he murdered forever -- primarily, but also to tell us what's going on in the "real" timeline, and final- and most importantly to segue into his big-ass speech.
"In all your travels, have you ever seen a star supernova? No? Well, I have. I saw a star explode, and send out the building blocks of the universe: other stars, other planets, and eventually, other life. A supernova. Creation itself. I was there. I wanted to see it, and be part of the moment. And you know how I perceived one of the most glorious events in the universe? With these ridiculous gelatinous orbs in my skull, with eyes designed to perceive only a tiny fraction of the EM spectrum, with ears designed only to hear vibrations in the air." Ellen protests that he was designed to be human, as close to human as possible, but he shakes his angry young head. "I don't want to be human! I want to see gamma rays, I want to hear x-rays, I want to... I want to smell dark matter! Do you see the absurdity of what I am? I can't even express these things properly, because I have to conceptualize complex ideas in this stupid, limiting spoken language, but I know I want to reach out with something other than these prehensile paws, and feel the solar wind of a supernova flowing over me." Equal parts beautiful and raging and hilarious, just like Cavil; Boomer stares. "I'm a machine. And I could know much more, I could experience so much more, but I'm trapped in this absurd body. And why? Because my five creators thought that God wanted it that way." Ellen's sad; he stalks away more upset than we've ever seen him.