"I beg your pardon?"

Sometimes, John wonders about the man. "Names, Sherlock. We can't go around saying we're agents Holmes and Watson, they'll arrest us in a flash. So what are we going to call ourselves?"

Sherlock is about to say something when they hear the sirens. Rushing, they only just manage to meet the officers that are crowding the entryway. Before Sherlock has a chance to say anything, John finds himself holding up an ID and announcing, with more bravado than he thought possible, "Officers, so glad you could assist us. I'm Agent Sitwell, and this is my partner, Agent Coulson."

The officers have the decency to only look mildly skeptical.

Luckily, Sherlock seems to have caught on to the whole situation, and steps in. "We drew the short straw for code names, I'm afraid- Bond and Q were laughing at us for weeks."

One of the officers still isn't convinced. "You use fictional names as code-names? Why are you even using codenames here?"

Think Thinkthinkthink. What's a reason the police might buy?

Ah-hah! "Because we're obliged to help if we're in the area, but if we use our real names, there are twenty different forms we have to fill out. And I'm not sure who thought of the codenames plan, but it's been tradition for at least seventy years"

The officers wince in sympathy.