Spoiler : Large Collection of Season 3 Spoiilers 

I recently watched the last episode of season 2 again. I was paying close attention to the part when Nathan gets shot and the presumed shooter walking away. Does anyone think that there is any possible chance that the shooter is a future Peter? I know it sounds strange but me and my friend agreed that when the 'man' was walking away he sort of walked in the same way as Peter. Any thoughts?