Season 1

“Jim, madness has no purpose, or reason, but it may have a goal.”

— Don Ingalls, Spock, Leonard Nimoy, imdb.com

“I fail to comprehend your indignation, sir. I have simply made the logical deduction that you are a liar.”

— Don Ingalls, Spock, Leonard Nimoy, imdb.com

“Sir, there is a multi-legged creature crawling on your shoulder.”

— Robert Hamner, Gene L. Coon, Spock, Leonard Nimoy, imdb.com

“[to Spock] All right, you mutinous, disloyal, computerized half-breed. We'll see about you deserting my ship.”

— Jerry Sohl, D. C. Fontana, James T. Kirk, William Shatner, imdb.com

“I have a responsibility to this ship, to that man on the bridge. I am what I am, Leila. If there are self-made purgatories, then we all have to live in them. Mine can be no worse than someone else's.”

— Jerry Sohl, D. C. Fontana, Spock, Leonard Nimoy, imdb.com

“Captain James T. Kirk: You suspect some danger? Mr. Spock: Insufficient facts always invites danger, Captain. Captain James T. Kirk: Well, I'd better get some facts.”

— Gene L. Coon, Carey Wilber, James T. Kirk, William Shatner, imdb.com

“Dr. McCoy: Mr. Spock, you're the most cold-blooded man I've ever known. Mr. Spock: Why, thank you, Doctor.”

— Gene L. Coon, Carey Wilber, Leonard McCoy, DeForest Kelley, imdb.com

“Spock: Captain, you almost make me believe in luck. Captain James T. Kirk: Why, Mr. Spock, you almost make me believe in miracles.”

— Robert Hamner, Gene L. Coon, Spock, Leonard Nimoy, imdb.com

“Mr. Spock: I made an error in my computations. Dr. McCoy: Oh? This could be an historic occasion.”

— D. C. Fontana, Spock, Leonard Nimoy, imdb.com

“Dr. McCoy: I, for one, could use a good non-reconstituted meal. Mr. Spock: Doctor, you are a sensualist. Dr. McCoy: You bet your pointed ears I am.”

— Fredric Brown, Gene L. Coon, Leonard McCoy, DeForest Kelley, imdb.com

“Mr. Spock: A thousand years, Captain? Captain James T. Kirk: Well, that gives us a little time.”

— Fredric Brown, Gene L. Coon, Spock, Leonard Nimoy, imdb.com

“Beam me up, Mr. Spock. We're free to go.”

— Paul Schneider, James T. Kirk, William Shatner, imdb.com

“Dr. McCoy: Mr. Spock, remind me to tell you that I'm sick and tired of your logic. Spock: That is a most illogical attitude.”

— Oliver Crawford, Shimon Wincelberg, Leonard McCoy, DeForest Kelley, imdb.com

“[Spock condemns Trelaine, an alien fop who has captured them] I object to you. I object to intellect without discipline. I object to power without constructive purpose.”

— Paul Schneider, Spock, Leonard Nimoy, imdb.com

“Capt. Kirk: You're not going to admit that for the first time in your life you committed a purely human, emotional act? Spock: No, sir. Capt. Kirk: Mr. Spock, you're a stubborn man. Spock: Yes, sir.”

— Oliver Crawford, Shimon Wincelberg, James T. Kirk, William Shatner, imdb.com

“In the long history of medicine, no doctor has ever caught the first few minutes of a play.”

— Barry Trivers, Leonard McCoy, DeForest Kelley, imdb.com

“If we start buzzing about down there, we're liable to find their mental power is so great they could reach out and swat this ship as though it were a fly.”

— Gene Roddenberry, Spock, Leonard Nimoy, imdb.com

“There's no such thing as the unknown—only things temporarily hidden, temporarily not understood.”

— Jerry Sohl, James T. Kirk, William Shatner, imdb.com

“Mr. Spock: Has it occurred to you that there is a certain...inefficiency in constantly questioning me on things you've already made up your mind about? Capt. Kirk: It gives me emotional security.”

— Jerry Sohl, Spock, Leonard Nimoy, imdb.com

“One of the advantages of being a captain, Doctor, is being able to ask for advice without necessarily having to take it.”

— Shimon Wincelberg, James T. Kirk, William Shatner, imdb.com