BBC Sherlock 221b drabble: G - Sherlock, John, Moriarty - "Risk"

Normal people sleep at night, Sherlock... not so much.

Rating: G
Characters: Sherlock, John, Moriarty
Word Count: 221 (the last word starting with b)
A/N: for you, 2ndskin, because I promised you this. Even if I meant an epic, several thousands words long narrative when I did, I hope you can forgive me for the shortness.
Summary: Sherlock plays Risk online at night.
Title: ( Risk )