The first bomb is actually attached to John. Sherlock and John are present at all three incidents. Mycroft is personally at 221b and metaphorically at Westminster. Is he perhaps somehow at the pool as well? If AGRA was employed by the government, and Mary was a sniper at the pool? Who did call Moriarty off? We are to believe it was Irene, but is that true? Three people, again and again… Whom will Sherlock choose? Mycroft or John? Saint or sinner? Family by blood or by choice?