I thought Berens did his homework on the show's vampire lore, which was something that I thought the writing team really dropped the ball on last season when they had a recurring vampire character.

Jody was awesome. Again, Berens did a good job weaving her backstory into the episode. Kim Rhodes was terrific.

The thing about Dean killing is that it just isn't that different from regular Dean. Maybe he's savoring the kills a little more, but I don't know. This is season one Dean really before Lenore and gray areas. What concerns me is the way he's pushing Sam away. I know a lot of fans are blaming Sam's "no brothers" rule, which Sam is clearly not following. I wonder though if the Mark of Cain is dampening Dean's humanity across the board -- not just in his dealings with monsters but with Sam and anyone he has conflict with.