So I've been watching, and I just kinda remembered...Dean and Sam's dad went to hell, right? Has it been said why?
Traded his soul for Dean's.
he got possesed by azazel trying to save Dean, then Dean shot azazel with the colt
he dies twice, both these answers are right
I haven't seen supernatural for ages...
when the gates of hell open, Dean's and Sam's Dad ( John Winchester ) got out and help Dean kill azael or the yellow eye demon with the Colt....... and the he went to heaven