Those are definitely two of the best X-Files episodes.
Any ideas on the black powdery substance surrounding Jacob's shack?
I don't buy into the idea that Ben shot Locke because he heard Jacobs speak, and Ben never had. Instead I think that Ben does not want to "share" the ability to see/hear Jacob with Locke. Perhaps he realizes that many of the others are looking for somebody else to lead them.
I like that theory Joe.