. . . meanwhile, Cal got upstairs to find Peter waiting outside his room. One look at the expression on Cal's face was enough to confirm Peter's suspicions that he'd brought a particular guest with him.

"If your friend makes it through," he said, "I won't sound the alarm."



So now, Peter waits. Going in through Cal's window is too exposed, and the hallway is the only other access point. And Peter's not going to insult Sherlock or himself by waiting in the spare bedroom again. He made his point last time.