Peter Bishop grew up as the neglected son of a mad scientist.
After his dad's mental institutionalization, Peter aimed to make himself as different from his father as he could. He's a college drop-out that passed for several months as a chemistry professor, along with an intuitive mathematician with a gambling problem.
Peter is now a civilian consultant for the FBI.
Peter: Besides, they're not even human. I'm not doing anything wrong.
Walter: Then why didn't you tell us? If you weren't doing anything wrong, why didn't you tell us? I don't know what's happened, but this is not you.
Peter: I have to talk to Secretary Bishop.
Altlivia: Who the hell are you?