Metalhead
I respect David Slade's work, but I feel that the story itself was severely lacking in some background, both for the "dogs", and the life of the protagonist. I mean, in the end we are supposed to be powerfully touched by the fact that the whole mission was to get a replacement teddy bear, but I would say the emotional impact of that final shot is limited at best, precisely because we don't see anything leading up to it.
I mean, nice work on conveying the realities of a post-apocalyptic society and all, but I feel this particular story could have been done better. To me this was the weakest ep of the season.