Sherlock hadn't left Molly's flat in three months. He was constantly bored, and becoming an insomniac because of the cabin fever. Molly refused to let him leave. If he was seen, that was it. Game over. John, Lestrade, Mrs. Hudson and probably Molly too would be killed. So he couldn't leave, not yet. Molly was still tracking down the spies who had been working for Jim. She felt like she was betraying him at first, but then she realized he would be beaming up at her from Hell, and appreciating the new level of complexity added to her life. He would still love her as much as she loved him.