Dead Letters doesn't have a lot going for it. Frank doesn't work with the group, but with a new candidate for the group Jim who's off the rails. Played by James Morrison who later appears in "The X-Files - Theef." The killer here's misspelling words as well, a coincidence, unlikely. The problem's the story focuses on Jim letting the killer into his head, than it being about the killer and he won't be in the group anyway, so it's unenthralling filler.