“Time, the best of all doctors, though it kills you in the end, had done more than therapy could.”

“According to NYPD figures, a contract killing could be had in Brooklyn for a mere $500. More often than not, though, people in New York were killed for free.”

“Artemis: (shocked) Why, Doctor? This is a sensitive area. For all you know I could be suffering from depression. Doctor Po: I suppose you could. Is that the case? Artemis: (head in hands) It's my mother, Doctor. Doctor Po: Yes? Artemis: My mother, she... Doctor Po: Your mother, yes? Artemis: She forces me to endure this ridiculous therapy when the school's so-called counsellors are little better than misguided do-gooders with degrees.”

“If you trust Google more than your doctor then maybe it's time to switch doctors.”

“If I had done this, if I had said that, in the end you are always more tormented by what you didn't do than what you did, actions already performed can always be rationalized in time, the neglected deed might have changed the world.”

“At the moment, it's simply a difference of opinon between the Doctor and you.. You both want the best. You've only tried to kill him a couple of times... I mean, don't worry about that. I've seen people do much worse to him and at the end of the day he'll take them out for pizza. He's very forgiving. The Doctor is brilliant,' [said Rory]”