Board Thread:Show-Related Questions and Answers/@comment-5679696-20130126173703/@comment-5521796-20130303184110

The only way a soul can end up in the Netherworld is if the Raith took it, (and we don't know if that's where it officially ends up or if in some other world) or if it's affects of the Sleeping Curse. If they die, they die, Daniel wasn't in the Netherworld, the only reason he came back was cuz of Dr. Frankenstien putting another heart in him. I think if someone dies in the season finale, they won't come back except in flashbacks.