It was all the way back in storyline #8, "Under Hill," that we learned of Mrs. Teasdale's immunity to Fae magic. As for all this talk of trying to contact Dodger, that all comes from the previous storyline, "Foreign Correspondence." That storyline took place entirely on Monday, August 22, 2005, and since this storyline is beginning on Friday, August 26, 2005, Mrs. Teasdale's aggravation is perhaps understandable.
Twenty-Eight - This Mortal Coil