User blog comment:Jyggalag Daedric Prince of Order/Season 9 A Bust?/@comment-24303436-20130531030550/@comment-5619706-20130531140415

True. Bobby Singer was never meant to be created, but the actress for Missouri wasn't able to show up, so the writers came up with Bobby instead (not complaining with this one).

I suppose one quick excuse they can whip up is Death himself reviving the slain for some reason he believes will help return everything to the natural order. *shrugs*