Shes very vital in the mythology weve been building toward the entire first half of our season.
[Bloodlines] kind of dropped you in the middle of a whole other story.
What she can do could play a big role in Sam and Dean getting Mom back.

Dean Buscher/The CW
In fact, it was the idea of dreamwalking that launched the alternate universe plot in the first place.
So we started thinking about the idea and actually even conceptualizing the spin-off.
Now, hes back, and the question is: Has he changed?
Dabb adds, This time away from Sam and Dean has given him a sense of clarity.
I think he feels hes failed at that.
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