"Mycroft, I've been gone for four minutes, who could possibly need me this early into my holiday?"
"Sherlock, I told you this on the phone."
Sherlock flipped up his collar and tightened his scarf as he stepped off the plane completely. He sniffed once in the air and tilted his head to the side for a second, scrunching up his nose, "Yes, well, I pay very little attention to you and your nonsense these days, Mycroft. You should know this by now. So come on. Who is it?"
Swinging his umbrella around in one swift, circular movement, the eldest Holmes brother shook his head, "England, my dear brother. England needs you." He watched as Sherlock's eyes narrowed, and broke out into a small grin, "I'm interested. Oh, hello again John, Mary. Thought any more about the-"
"We are not naming our child after you, Sherlock. Besides, it isn't even a girl's name."
"Don't be so silly, John. Of course it is. Why do you think some people are called Shirley?"
"Because it's their name?"
"If I can break apart this little domestic, there is in fact an entire country at risk here, so if we could all just hop back in the car, that would be great."
"Oh Mycroft, lighten up, will you? I'm sure it can't be that bad."
Resisting the (very tempting) urge to stab Sherlock with his umbrella, Mycroft instead chose to simply roll his eyes, "Sherlock Holmes, you have murdered a man, in front of myself and many other police officers. Had it been anyone else, they would have most certainly been going to jail for a very long time. I, playing the appropriate role as big brother, managed to get you off of that charge. Now, for goodness sake-get in the car!"
Sherlock said nothing, instead managing to express everything through his eyes, succeeding in making a snide remark that only Mycroft could understand;
That extra chocolate seems to have made you a bit crabby. Maybe you should sleep a little.
Although there was more than enough room in Mycroft's private car, Sherlock valued his life more than people thought he did, so he chose to sit in the back of the other car (leaving plenty of room for John and Mary, of course).
When the three passengers felt the car begin to move, Sherlock adjusted his legs into a more comfortable position and bent his head so it was closer to John's ear, "So are you going to tell me who is so dangerously important that the whole of England is in danger?"
John cleared his throat, twice, and for the first time that day found himself seeking comfort in Mary, resting their intertwined hands on her leg, "Sherlock-it's Moriarty."