I'll change the locks post-haste. Set a few traps.

Sherlock [on his father visiting the brownstone]

Which one? Our overgrown putt-putt golf course? Or our condemned warehouse full of asbestos?

Davis Potter [on his business properties]

So, I walked all the way to the eastern edge of the property, and I did not find a thing. No dead bodies, no secret hideouts, no smoke monster. There's plenty of mud, though.

Joan

I'm quite certain they were staging a fake murder when they fell victim to two real ones.

Sherlock

Sherlock: You're typically more expansive after your first hit of caffeine.
Joan: Yeah, well, you brought a bald cat to breakfast. I'm a little distracted.

Joan: You know, we don't have to do this whole 'secret agent' thing. We could just, ah, talk like normal people.
Emil Kurtz: That's easy for you to say. You're not the one spying on Morland Holmes!

You're not supposed to be an "asset," you're supposed to be a scientist, an impartial seeker of truth! But you're not! You're a charlatan! And you've sent at least one innocent man to prison, Louis Bowman!

Sherlock

We'd show you the crime scene photographs, but you'd probably just "recontextualize" them.

Sherlock

So this guy rips off other people's selfies, blows them up, and charges a hundred grand apiece? Surprised I"m not investigating *his* murder.

Detective Bell

Congratulations, Holmes. You just helped three spies get away with murder.

NSA Agent Dean McNally

By all means, distract me while I'm holding 240 volts in my hand!

Sherlock

Lin Wen: You think he was two-timing you!
Joan: Say he was. That would mean he was also two-timing *you*.
Lin Wen: True, but it's not like he and I were exclusive.
Joan: You said you were about to move in together!
Lin Wen: Sure, but that wouldn't have meant we had to stop having fun!

Elementary Quotes

I've been recording our whole conversation. And if you don't leave my home, it too will end with a murder. Just not mine.

Sherlock [to Mr. Clay]

Lin: Too bad Dr. Reed isn't here. She could see you already have a kid [Sherlock]. Too soon?
Joan: Too soon.