warehouse 13 S04E10

We All Fall Down

 Mrs. Frederic and Steve are in the Vatican with Brother Adrian, looking for a possibility to free Artie from the effects of the astrolabe. While doing so, they find a precise description what the Astrolabe is actually doing to him: It has split Artie's personality and the dark side of this personality slowly erases the good side. Meanwhile at the Warehouse, the team finds H. G Wells' research on the dagger from Artie's vision. They find out that Artie wants to use the dagger to break the container of the chinese orchid, which would release a deadly disease—the English Sweating sickness—into the world. While Pete and Myka go to Prague to retrieve the dagger, Steve and Claudia go to Berlin looking for the orchid. Artie forestalls Pete and Myka by using Isaac Parker's noose and goes after the orchid himself, which was not in Berlin. The team rushes after Artie to foil his plans and bring him to his senses, but fail. Artie releases the orchid whereupon his vision of the dagger comes true.