Data Stellare 5121.5: Investigando sulla scomparsa del dottor Ozaba e del dottor Linke nel sistema Minariano, Kirk, Spock e McCoy vengono rapiti da due Viani. L'unica altra forma di vita presente è Gem, una giovane donna muta che sembra avere il potere di curare le ferite altrui trasferendole sul proprio corpo.

McCoy: Well, I don't know about you, but I'm going to call her Gem.
Spock: Gem, Doctor?
McCoy: Well, that's better than «Hey, you». [T:07:29]

Sulu: Do you suppose our landing party could be in any danger?
Scott: That's not likely. The planet's atmosphere will give them ample protection. And if I know Captain Kirk, he'll be more worried about us than we are about him. [T:18:48]

McCoy: Men weren't intended to live this far underground. It's just not natural.
Kirk: And space travel is? [T:26:20]

McCoy: I'm a doctor, not a coal miner. [T:26:29]

McCoy: I'm not a mechanic. [T:26:41]

Kirk: The best defense is a strong offense, and I intend to start offending right now. [T:32:37]

Lal: Your will to survive, your love of life, your passion to know... Everything that is truest and best in all species of beings has been revealed to you. Those are the qualities that make a civilization worthy to survive. [T:37:46]