Kirk: "I'm Captain Kirk. This is..."
Crater: "The heroic Captain and the intrepid doctor cross interstellar space to preserve our health. Your sense of duty is overwhelming. Now will you please go back where you came from and tell whoever issues your orders to leave me and my wife alone. We need salt against the heat. Aside from that, we're doing very well, thank you."
McCoy: "I'm pleased you're doing well but I'm required to confirm that fact."
Crater: "Doubtless the good surgeon will enjoy prodding and poking us with his arcane machinery. Go away, we don't want you."
McCoy: "What you want is unimportant right now. What you will get is required by the book."
Kirk: "Quote. All research personnel on alien planets are required to have their health certified by a starship surgeon at one year intervals. Like it or not, Professor, as commander of the starship, I'm required..."
Crater: "To show your gold braid to everyone. You love it, don't you."
Kirk: "He's all yours, Plum. Doctor McCoy."
McCoy: "Sit down and breathe deeply, please."
Crater: "Did I hear you call him Doctor McCoy?"
McCoy: "You did."

Spock: Miss Uhura, your last sub-space log contained an error in the frequencies column.
Uhura: Mister Spock, sometimes I think if I hear that word frequency once more, I'll cry.
Spock: Cry?
Uhura: I was just trying to start a conversation.
Spock: Well, since it is illogical for a communications officer to resent the word frequency, I have no answer.
Uhura: No, you have an answer. I'm an illogical woman who's beginning to feel too much a part of that communications console. Why don't you tell me I'm an attractive young lady, or ask me if I've ever been in love? Tell me how your planet Vulcan looks on a lazy evening when the moon is full.
Spock: Vulcan has no moon, Miss Uhura.
Uhura: I'm not surprised, Mister Spock.

Spock: "Fascinating."
McCoy: "So improbable we almost didn't check it."
Kirk: "What?"
Spock: "Sodium chloride. Not a trace of it."
McCoy: "This man has no salt in his body at all."
Kirk: "Can you explain that, Doctor?"
McCoy: "I can't, except that what we normally carry in our bodies is gone from his."
Spock: "He would die almost instantly."
Kirk: "How? There isn't a mark on his body."
McCoy: "Except the red rings on his face."
Kirk: "You called that skin mottling."
McCoy: "I thought it was, sir. Another error on my part."
Kirk: "I'm not counting them, Bones. Are you in the mood for an apology?"
McCoy: "Oh, forget it. I probably was mooning over her. I should have been thinking about my job."
Kirk: "Perhaps you were. Both Nancy and Crater went out of their way to mention one item they needed."
McCoy: "Salt tablets."
Kirk: "Mister Spock, outfit a landing party. We're beaming down with some questions."

Rand: "Why don't you go chase an asteroid?"
Redshirt: "Hey, Janice, is that for me?"
Rand: "Don't you wish it was?"
Blueshirt: "How about that?"
Redshirt: "Yeah, how'd you like to have her as your personal yeoman?"

McCoy: "Nancy. Well, come in. come in. I've been worried sick about you. I wonder why Jim didn't tell me he found you."
Nancy: "I'm so happy to see you, Leonard. The others, they, I, I don't relate to them as much as you. You have such strong memories of me."
McCoy: "Well."
Nancy: "You do care, don't you, Leonard? It makes me feel so, so safe."
McCoy: "Nancy, er..."
Nancy: "My husband? I like your feelings better. Much stronger. But you're tired, You need to rest."
McCoy: "You're as bad as Jim Kirk. He's been telling me to take these."
Nancy: "I think you should."

Sulu: "GQ three now secured except for decks five, seven, and ten. Come in, please."
Uhura: "He's not in supply and maintenance."
Sulu: "Go to Engineering now. Run through file photos of the crewmen there."
Uhura: "Check."
Security (Over Comm): "Deck five reporting. Crewman Green is not in his quarters. No one has seen him."
Sulu: "Keep in mind if you find him, he's not Crewman Green. The Captain reports Crewman Green is dead."
Rand: "And he, or rather it, followed me. I thought there was something twitchy about him."
Sulu: He, whatever, was probably your crewman, too, Lieutenant."
Uhura: "He must have been it. You know, I would have remembered a crewman like him."
McCoy: "The creature leading you a merry chase, Mister Sulu?"
Sulu: "The creature?"
McCoy: "Or whatever it is that's killing the crewmen. Perhaps I can help. Fill me in."

Spock: (on biobed) "It wasn't McCoy. It was the creature. It hit me. Crater grabbed my phaser. I wondered about McCoy. Doubt had crossed my mind."
Rand: "Captain. Professor Crater."
Kirk: "Dead. But it had you, too."
Spock: "Fortunately, my ancestors spawned in another ocean than yours did. My blood cells are quite different."

McCoy: "No." (she goes to Kirk again) No! (she transforms into her natural state)
(Kirk screams, McCoy fires the phaser, she changes back into Nancy)
Nancy: "Leonard. Leonard, no. Leonard, please."
McCoy: "Lord, forgive me." (fires again and she dies)
Kirk: "I'm sorry, Bones."