Peter frowned and shook his head. "Don't, Nathan. Don't beat yourself up over it, please. It's. . .it's what drove my Nathan and me apart, and then Sylar. . ." He looked away for a moment. "My Nathan died thinking that I hated him."
He took a deep breath and frowned again, listening to his brother. "There has to be a way to convince him to stop this. To help him control it. . ."