Data Stellare 4657.5: In seguito ad una chiamata di soccorso, Kirk, Spock e McCoy scendono su un pianeta e trovano dei Kelvani, alieni provenienti dalla galassia di Andromeda per valutare la possibilità di nuove conquiste. A causa della perdita della loro nave, si impossessano dell'Enterprise dopo aver neutralizzato quasi tutto l'equipaggio.

Rojan: We do not colonize. We conquer. We rule. There is no other way for us. [T:06:59]

Rojan: These shells in which we have encased ourselves... they have such heightened senses. To feel, to hear, to smell. How do humans manage to exist in these fragile cases? [T:08:13]

Kirk: What are the odds in such absolute duplication of life forms in another galaxy?
Spock: The chances are very much against it. [T:09:18]

Kelinda: This business of love, you have devoted much literature to it. Why do you build such a mystique around a simple biological function?
Kirk: We enjoy it.
Kelinda: Literature? [T:34:12]

Spock: Humans are very peculiar. I often find them unfathomable, but an interesting psychological study. [T:35:41]

Scott: It's green! [T:37:08]

Kirk: You thought I was taking your woman away from you. You're jealous. You tried to kill me with your bare hands. Would a Kelvan do that? Would he have to? You're reacting with the emotions of a human. You are human. [T:44:10]

Rojan: You would really do that? You would extend welcome to invaders?
Kirk: No. But we would welcome friends. [T:45:23]

Kirk: Being human does have certain advantages -being able to appreciate the beauty of a flower, of a woman. [T:46:43]