Gregson: She's my daughter.
Sherlock: She's my best friend.

Sherlock: We're supposed to be partners.
Joan: We are. So be my partner.

Helping others before yourself is your nature. It always has been.

Sherlock [to Joan]

Beppo: Who are you?
Sherlock: I'm the man who's going to bring you to justice.

Several weeks ago, when someone started breaking into homes and stealing nothing but leaving a trail of ceramic destruction, it came became clear.

Sherlock [to Beppo]

DCI Jones: When you don't shoot the suspect, you can actually send him to prison.
Joan: Once again, just because I'm American does not mean I love guns.
Jones: Right. And I supposed you don't call football soccer either.

Now we've got muggers dousing people for phones and handbags.

Sherlock

Kitty: So when are you going to tell Sherlock?
Joan: Tell him what?
Kitty: That you aren't happy in London.

Joan: That's (sulfuric acid) one way to get rid of fingerprints.
Sherlock: I'd call it an abundance of caution.

If we go another day without an arrest, they'll get Elton John to rewrite the lyrics to "Candle in the Wind" again.

Jones

Sherlock: You seem troubled that someone's invaded your privacy.
Casey: I get it. It's quite rich because I'm a pap(arazzi), right?

It's different. You were running away from something. Joan was running to something.

Kitty [to Sherlock]

Elementary Quotes

Holmes: Why do you suppose you hate your job so much?
Watson: I don't hate my job.
Holmes: You have two alarm clocks. No one with two alarm clocks loves their job. Two alarm clocks mean it's a chore for you to get up in the morning.

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.