Len was definitely reminiscent of "Nightshifter" guy. They even both referenced robots! I think we'll be seeing him again, possibly thoroughly evil at that point. I thought this episode was delightful, a good mix of funny and dark. BTW, am I the only one who got a vibe off of the little kid Sam talked to and his dead eyes- until he inappropriately got perky about "Aunt Linda" or whoever, that visited at Christmas? I figured the only reason Sam got to talk to him instead of Dean was that something's off with the kid.