I think the disparity of the age of Peter is that in the original script he was supposed to be 35 but obviously when they got Josh for the part they brought the age down to Josh's age. ( I saw the transcript of the original notes on the Pilot script where it described Peter Bishop's character and demeaner and in that it mentioned he was 35). After all in season 4 he describes himself as a 32 year old man. The only person who never aged was Olivia as in season 5 Peter described her as a woman in her late 20s. How old was she when she brought Sanford Harris to justice as a prosecutor for the marines?
