QUOTE (LurkNoMore @ Nov 14 2006, 04:14 PM)

I'm currently very inclined to believe that there is no way to change what Isaac has painted but Hiro has changed the past twice now.
Once when he comes back to warn Peter and once when he goes back to save Charlie (you see the picture change so something did actually change).
I don't think Hiro will be able to change the past, or future, drastically, but he can change it to some extent.
Future Hiro's appearance to Peter has been bothering me for quite some time now, and makes me wonder what event in the future would so alarm Hiro that he would come back and risk a "rift" to offer a warning. Because Future Hiro is made to look at least a few years older than current Hiro, I wonder if future Hiro has some other fish to fry completely (or perhaps just marginally) unrelated to the blow-up of New York. Without knowing what future events Hiro is trying to influence, we don't positively know if his appearance to Peter has actually changed the future. It is entirely plausible that the future he was trying to prevent was actually unwittingly caused by his interference with Peter on the subway.
However, we were shown the picture without Hiro and the picture suddenly with Hiro after he time shifts. As much as everyone likes Charlie, however, if Hiro manages to save her without grave repurcussions to discourage him from playing tiddly-winks with time the show is rather pointless because Hiro is vastly too powerful and might as well blip back and shoot Sylar before he starts killing people (thus saving New York and lots of other murderer Heroes in the process).