I put upon my head The Teacher!
“Saturn rings around my head down a road that’s Martian red!”
“I’m Tweedle-Dum, he’s Tweedle-Dee!”
The creature within me is gone. I am free of it and the pain.
And I’m also quite blind. An equitable trade, Doctor. Thank you.
Don’t call me Tiny.
You’ve got a foolie, but I can’t play. I don’t know the rules.
SPOCK: Frankly, I was rather dismayed by your use of the term half-breed, Captain. You must admit it is an unsophisticated expression.
KIRK: I’ll remember that Mister Spock, the next time I find myself in a similar situation. 
Steady as we go, helm.
KIRK: Back to his old course.
SPOCK: He may think we’re destroyed, Captain.
KIRK: I wouldn’t make that assumption. I don’t think their Captain will either. 
Sorry - neither.
You aren’t very persistent, Mister Sulu. The game has rules. You’re ignoring them. I protest and you come back. You didn’t come back.
Now you’re talking, Uhura!
I mean, Doctor, that we are faced with a staggering contradiction.
FELLINI: All right, Kirk. Maybe this will make you laugh. Sabotage, espionage, unauthorized entry, burglary. How are those for starters? And I can think up lots more if you don’t start talking.
KIRK: All right, Colonel. The truth is, I’m a little green man from Alpha Centauri. A beautiful place. You ought to see it.
FELLINI: I am going to lock you up for two hundred years.
KIRK: (ponders a moment) … That ought to be just about right.
The top of what?
And then you howled in rage, and said ‘Look at her. Look upon death, and always remember.’ And I always have.
You! What planet is this?
“I think Mr. Reed is old enough to make his own decisions.”
Look, fella, you take a sip too much of that old wood alky…
It’s GREEN!
“How can that be, Captain?” Asked of Kirk in every other episode, as if he had an answer to every instance of craziness in the universe.