"Every great cause has martyrs. Every war has suicide missions and make no mistake, this is war. One half of the human race at war with the other. The invisible army hovering at our elbow, tending to our homes, raising our children. Ignored, patronised, disregarded. Not allowed so much as a vote. But an army nonetheless, ready to rise up in the best of causes. To put right an injustice as old as humanity itself. So you see, Watson, Mycroft was right. This is a war we must lose."

DI Lestrade: "I thought you understood everything."
Sherlock Holmes: "Of course not, that would be an appalling waste of brain space. I specialize."

"I'm an army doctor, which means I could break every bone in your body while naming them."

"Fear is wisdom in the face of danger, it is nothing to be ashamed of."

"Dead is the new sexy."

"Dear Lord, I have never been so impatient to be attacked by a murderous ghost."

Sherlock: "I saw you die. Why aren't you dead?"
Moriarty: "Because it's not the fall that kills you, Sherlock. Of all people, you should know that. It's not the fall, it's never the fall. It's the landing!"