As we get one step closer to the season three hiatus, what we find is a lot of groundwork being laid before the real action begins. “When the Dead come Knocking” isn’t the strongest episode of the season. Throughout, it feels very much like hands on the reins keeping the show on course to fill out the hour, without diving headlong into the confrontation everyone is waiting for. In a series where more happened in a few episodes at the start of the season than in a big finale of any other TV show though, an episode is really only “weak” by comparison. “When the Dead come Knocking” remains a solid piece of business and the set-up work it does is necessary.