The investigation into the bombing at GRIT resurrects some old problems for Art, who receives a visit from a determined RCMP officer asking about the Katja Obinger case. Cosima learns more about what was going on at GRIT, while Charlotte and Alison head to the United States to inoculate a sick Leda clone. Kris and Stephanie discuss episode 1x03 of Orphan Black: The Next Chapter, "Dogged in Denial."