Kirk: Bones, did you ever hear of a doomsday machine?
McCoy: No. I’m a doctor, not a mechanic.
Star Trek — Season 2: Episode 6 — “The Doomsday Machine”
Spock: The child was named Leonard James Akaar?
McCoy: Has a kind of a ring to it, don’t you think, James?
Kirk: Yes. I think it’s a name destined to go down in galactic history, Leonard. What do you think, Spock?
Spock: I think you’re both going to be insufferably pleased with yourselves for at least a month… sir.
Star Trek — Season 2: Episode 3 — “Friday’s Child”
Edith: You know as well as I do how out of place you two are around here.
Spock: Interesting. Where would you estimate we belong, Miss Keeler?
Edith: You? At his side, as if you’ve always been there and always will. And you? You belong in another place. I don’t know where or how. I’ll figure it out eventually.
Spock: I’ll finish with the furnace.
Edith: …Captain. Even when he doesn’t say it, he does.
Star Trek — Season 1: Episode 28 — “The City on the Edge of Forever”
Kirk: What would you say the odds on our getting out of here?
Spock: Difficult to be precise, Captain. I should say approximately 7,824.7 to 1.
Kirk: Difficult to be precise? 7,824 to 1?
Spock: 7,824.7 to 1.
Kirk: That’s a pretty close approximation.
Spock: I endeavour to be accurate.
Kirk: You do quite well.
Star Trek — Season 1: Episode 27 — “Errand of Mercy”
Spock: Curious. What Chief Vanderberg said about the Horta is exactly what the Mother Horta said to me. She found humanoid appearance revolting, but she thought she could get used to it.
McCoy: Oh, she did, did she? Now tell me, did she happen to make any comment about those ears?
Spock: Not specifically, but I did get the distinct impression she found them the most attractive human characteristic of all. I didn’t have the heart to tell her that only I have…
Kirk: She really liked those ears?
Spock: Captain, the Horta is a remarkably intelligent and sensitive creature, with impeccable taste.
Kirk: Because she approved of you?
Spock: Really, Captain, my modesty…
Kirk: Does not bear close examination, Mister Spock. I suspect you’re becoming more and more human all the time.
Spock: Captain, I see no reason to stand here and be insulted.
Star Trek — Season 1: Episode 26 — “The Devil in the Dark”