Uriel and Castiel meet at a playground to talk about how "something is wrong" in Heaven. Castiel then calls Anna and tells her that he is considering disobedience; however, he does not believe it is "good." He asks her to tell him what he should do, but she refuses, reminding him that he had thought her help beneath him a short while before. She tells him to make his own decisions. Castiel returns to the warehouse where Alastair was kept and finds out that a leaky pipe enabled Alastair to escape from the devils trap. Uriel arrives while Castiel is examining the trap. Castiel declares that he built the old Enochian trap, and insists that a demon could not have defeated it. He demands to know the truth. Uriel admits that he was responsible for the deaths of the 7 angels, and that he wishes Lucifer to rise and humanity to be destroyed. He has been converting other members of the garrison to this viewpoint, and killing those that disagreed. Uriel attempts to recruit Castiel, but fails, and Castiel attacks him. Uriel fights back, bringing Castiel to his knees. Anna arrives clandestinely and stabs Uriel from behind, saving Castiel. Castiel visits Dean in the hospital and confirms that Deans actions in Hell resulted in the breaking of the first seal. When Dean asks why he was not left in Hell, Castiel responds that "the righteous man who begins it is the only one who can end it." 4.18 The Monster at the End of This Book.