September 27th, I think. I don't think it will be Dean's last season - there's a lot of dark stuff in Supernatural, but I can't see the producers making that big a step. I don't think they'd have given Dean so much leeway, a year, if they weren't planning to find something to fix it in the meantime. And I don't think they could really have the show without Dean. It crossed my mind that it might be Sam's last season, since he might have "come back wrong" and the threat hanging over welching out of the deal is his death - but again, would it be the same show without Sam? But then they seem to be moving out of the big initial storyline of "chosen kids", so who knows? I don't see myself how they're going to get Dean out of this, but I don't think it'll be his last season, unless it's the last season of the show.