So they didn't commit a murder so much as provide you with a murder-tunity.

Sherlock

Perhaps it entered your mind subconsciously. Were your dreams filled with two flounders slapping together? A ketchup bottle being squeezed repeatedly whilst a nearby walrus issues a death rattle?

Sherlock [to Joan, on the neighbor's noisy sex]

I was just marveling at how you were able to sleep so soundly last night given the incessant sex noise.

Sherlock

Ben Garrett: How do you do all that?
Sherlock: I was bitten by a radioactive detective.

Sherlock: It occurred to me that our Ranger might've been killed by an obsessed fan attempting to recreate a particular death.
Joan: And?
Sherlock: Unfortunately, the deaths in the comics involve being sent back in time, buried underground, made microscopic, impersonated by an alien, and in my particular favorite demise, pushed over a waterfall, locked in the embrace of his nemesis.

It's pretty hard to say no to someone who just donated a quarter of a million dollars to a charity I care about. But that was the whole point, right?

Joan

The flesh-and-blood Midnight Ranger was shot dead last night. Unfortunately, the bullets used were not radioactive, so he'll be remaining quite dead.

Sherlock

In what universe are these people not all dead of cancer?

Sherlock [about superheroes' origin stories]

He proved tweed isn't bulletproof! You must be proud.

Bell

We created a vacuum, and the air rushed in. Or more specifically, the heiress.

Sherlock

You're standing on a precipice, and I cannot watch you tumble over it, mate. I refuse to. Alright?

Sherlock

You named your killer robot 'Gus'?

Joan

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.