Sherlock - Season 4 Prequel

"Moriarty is dead, no question. More importantly, I know exactly what he's going to do next."

"If it wasn't my wife's business to talk to the staff, I would talk to you myself."

Sherlock: "Between you and me, John, I always survive a fall."
Watson: "But how?"
Sherlock: "Elementary, my dear Watson."

"We all have a past, Watson. Ghosts. They are the shadows that define our every sunny day."

Mary: "I've been making enquiries. Mr. Holmes asked me."
Watson: [turns to Sherlock] "Holmes, how could you?"
Mary: "No, not him, the clever one."

DI Lestrade: "He said, 'There's only one suspect', and then he just walks away and now he won't explain."
Mrs. Hudson: "Which is strange, because he likes that bit."
DI Lestrade: "Said it's so simple I could solve it."
Mrs. Hudson: "I'm sure he was exaggerating."

"Good afternoon. I'm Sherlock Holmes, this is my friend and colleague Dr. Watson. You may speak freely in front of him, as he rarely understands a word."

"I'm not an addict, I'm a user. I alleviate boredom and occasionally heighten my thought processes."