Eh? You actually have a brother? [Color him surprised because Sherlock never mentioned siblings....in fact he never really talked about his family, has he?]

Well I certainly don't remember meeting anyone by that name, as I'm sure it was you that I saw back home. But...I'm glad to see you've been okay here, for the most part. [Saying as he looks around at the mess.] Besides the mess, have I missed anything big happening in this world?