Joan: Do you need to take that?
Sherlock: No, I don't believe she does.
Joan: How would you know?
Sherlock: Because we got a lot of work to do and very little time to do it.
Joan: I'm here. I can help.
Sherlock: And help you shall.
Joan: What if my phone rings? Do I need your permission to answer it?
Sherlock: You are not my protege.
Kitty: Uh. I'd like to go to the loo. Unless either of you have any objections.

Sherlock: I was worried. So I kept you otherwise engaged. That was a mistake. I have watched the progress you have made over the last few months with great pride. You've come a very long way. I should have trusted you to continue that progression.
Kitty: I knew.
Sherlock: You knew what?
Kitty: I could tell you had figured out about Zachary. I knew that's why you were keeping me busy. But I was glad of it. I was afraid as well. Zachary's sweet. He likes me. What you did made me feel ... very protected ... very loved.

You, Watson, are something of a romantic terrorist.

Sherlock

It's connected to the conflict at your core. The tension between a conventional life and the yearning to heed the call of adventure.

Sherlock

All you need to do is find one that is true to your nature. It really is quite remarkable to me. You remain a far more interesting person than you give yourself credit for.

Sherlock

I expect nothing, which is why I'm such an exceptional detective.

Sherlock

You engaged in horizontal refreshment with this man.

Sherlock

Central to Officer 73199. Officer 73199, no response. Officer 73199, Alec Flynn, is End of Watch. He has gone home for the final time.

Dispatch

I care about your sobriety. And I depend upon every member of this group, including you, to care about mine.

Sherlock

I abhor the dull routine of existence.

Sherlock

Buros: That supposed to scare me?
Bell: It's supposed to remind you, Niko, what you did. Who you hurt. But don't worry if the cuffs don't work, we'll find other ways.

Watson: How do you do it, guess things?
Sherlock: I observe and then I deduce.
Watson: How did you know I was a doctor, you said you could tell from my hands.
Sherlock: Hand, singular. It was soft no calluses.
Watson: How did you know my father had an affair?
Sherlock: Google. Not everything is deducible.