Hey guys!  I'm wondering if there are any time travelling fics, where post-hell Sam (or whatever) goes back in time (with or without Cas's help) to fix things.  If he could start fixing things and his family finds out about him not being the original Sam and all of that, that would be awesome.  

I'd prefer if the family stayed together, like Sam tried to fool his family into thinking everything was normal or whatever.

Happy endings are awesome and please only completed stories or stories that you can pretty much guarantee will be finished in a timely manner.  I'm really impatient.  :)  

Thanks so much!