Walter: I saw a man…half-starved. And I used him because it suited me. Because he was nothing more than an acceptable loss as long as I got what I needed. Is that who I am, Peter? Is that something you can see coming from my mind? From my heart? Am I the person that would leave in the middle of his night on his own?”
Peter: “Walter.”
Walter: “Those are the actions of a man of hubris, arrogance, and that’s not me, Peter. That’s him.”
Peter: “Him?”
Walter: “Don’t you see? I’m not safe. It’s my mind. Ever since the pieces of my brain were re-implanted, it’s been changing…me…back into the man I was before. Bit by bit…I’m losing myself, Peter. I’m losing the man that you helped me become.”
Peter: “Listen to me, I’m not going to let that happen. We need you. You are our only hope to defeat the Observers. And I’m going to be here with you every step of the way.”
Walter: “Please son, whatever happens, don’t let me go.”
Peter: “I won’t, Dad. I promise.”