WHO: Saddest moment, Bela's apparent demise. If permenant, it will cut down on the whining on the net.
On the upside, she did end up in Hell about the same time as Dean so it is possible they will team up raise some Hell.
I was going to say the saddest moment for me was when Bela was introduced... her "apparent demise" actually brought a Grinch-like twitch to the corner of my mouth, around the same time the audible little snicker emerged.
That would be a kicker, eh? Dean having to team up with Bela to get out of Hell... I can see Dean double-crossing her at the last second and leaving her to rot/burn there, though.
"Something, something, something, Dark Side... something, something, something, complete!"