Poor Sam, he's doubting himself so much! Especially after seeing the security video of how he killed the hunter. Ever since he found out that he had some kind of a demonic destiny, he's been afraid something like this would happen. Ouch, asking Dean to kill himself before he hurts anyone else - bring on the angst, I say!
Still, Evil!Sam was pretty cool! I liked Jared Padalecki's performance in this episode. And it was good to see Alona Tal again, too. I very much liked this episode, and since the demon is still out there, there is a possibility we might see Evil!Sam again some day.