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

So someone bought his stolen patents... and made a Terminator.

Gregson

Only slightly less outrageous than the glowing mastiff, wouldn't you think?

Sherlock [regarding an attack robot]

Is he also modified to account for his whereabouts the night Charles Baskerville was murdered?

Sherlock [about a genetically-modified dog]

Joan: Where are you going?
Sherlock: It's the first Thursday of the month!
Joan: Wait, you're leaving to go play chess?!

Sherlock: It's a brag made of brick, stone, and drywall.
Henry Baskerville: My late father built it. After he plowed over two farms and a school. He named it 'Baskerville Hall.'
Sherlock: Small wonder that your father and mine were friends.

Elementary Season 4 Episode 16 Quotes

Joan: Where are you going?
Sherlock: It's the first Thursday of the month!
Joan: Wait, you're leaving to go play chess?!

Sherlock: It's a brag made of brick, stone, and drywall.
Henry Baskerville: My late father built it. After he plowed over two farms and a school. He named it 'Baskerville Hall.'
Sherlock: Small wonder that your father and mine were friends.