What were you guys like before

Greg and John realize just how little they know about Mycroft and Sherlock. They know that there's a past that causes their petty brotherly feud, but they don't know why. Mycroft and Sherlock decide to explain it to them and it brings light to some things that they didn't even know the other went through or did because of what happened.

All rights go to Sir Arthur Conan Doyle and BBC Sherlock