"Absolutely. It's good to see Sherlock making friends. I worry about you, too, you know." He puts a hand on Sherlock's shoulder for a moment. They smile at each other, Obadiah with his patronizing fake fondness, Sherlock with undisguised loathing.

Then Obadiah turns away and walks out the door, his suit jacket still wrinkled and stained from Tony's hug.

"Well," says Sherlock, as soon as the door is firmly shut again. "I am sorry to have exposed you to that particular feud. I don't like him because he lies to Tony, and he doesn't like me because I notice."