I've already posted these, but I'm re-posting now. This reminds me why I was staying only focused on the upcoming episode at the end of last season.
Hi, my name is Wendy, I am anal.
The next episode, airing this Wednesday, is 4.03, "The Man in the Outhouse". You can read the full description for this episode at TheFutonCritic.
Here are the released episode stills, with a familiar returning face at the counter, the crazy stalker from "The Secret in the Soil." That should make for an interesting encounter.