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.
(answering the phone) Bishop's House of Horrors.Peter
Olivia: Before you knew she wasn't me. She was fun, right? She had an easier smile; I mean, that's what you said.
Peter: Olivia, I wanted you to know that I noticed the differences. But I thought it was because of me, because of us. I thought that I was bringing out a different side in you But it was never because I wanted to be with her more, because I don't.