Dr. Deaton: Your eyes, they were red, bright red.
Scott: How is that possible?
Dr. Deaton: It's rare, something that does't happen within a hundred years, but every once in a while a beta can become an alpha without having to steal or take their power. They call it a true alpha. It's one that rises purely on the strength of character, virtue, by sheer force of will.
Scott: You knew this would happen.
Dr. Deaton: I believed. From the moment I knew you were bitten, I believed.