While Mason is swanning about in Britain we are back on the trail of that horrible Mr Itis. So far we know he is small, even smaller than Mason. We also know he has the ability to actually get inside Boss. Mycroft has been reading up on what he could be and we think he may be a parasite. We also found a recipe for a parasite cleanse. So we're going to make it and put it in Boss's coffee. The worst thing it could do is make him poop a lot so it's pretty safe. He gets the coffee poops anyway.