Leonard Nimoy credited as playing...
Mr. Spock
- Capt. Kirk: In the late nineteenth century in Arizona, two factions fought for control of the town Tombstone. The Earps - Morgan, Virgil and Wyatt - who were the town marshals, along with Doc Holliday.
- Spock: And the Clanton gang. On October 26th, they... had it out.
- Chekov: Who won?
- Capt. Kirk: The Clantons lost, Mr. Chekov.
- Chekov: And we... are... the Clantons?
- Melkotian Buoy: [voice] Aliens. You have encroached on the space of the Melkot. You will turn back immediately. This is the only warning you will receive.
- Spock: Vulcan, Captain.
- Capt. Kirk: English.
- Chekov: It was Russian, sir. Every word.
- Uhura: No, Captain, it was Swahili.
- Capt. Kirk: Interesting. Telepathy.
- Spock: Unquestionably. Most impressive.
- [last lines]
- Spock: This afternoon, you wanted... to kill. Didn't you?
- McCoy: But he didn't kill, Mr. Spock.
- Spock: But he wanted to, Doctor.
- Capt. Kirk: Is that the way it seemed to you, Mr. Spock?
- Spock: Yes, Captain.
- Capt. Kirk: Mr. Spock - you're absolutely right. That's exactly the way it was.
- Spock: Mankind - ready to kill.
- Capt. Kirk: That's the way it was in 1881.
- Spock: I wonder how Humanity managed to survive.
- Capt. Kirk: We overcame our instinct for violence.
- [Morgan Earp has shot a man]
- Spock: Is this a dead man, Doctor?
- McCoy: Very dead, Mr. Spock.
- Capt. Kirk: That's one thing we can be sure of here. Death is real.
- [Kirk comes precariously close to a shoot-out with Morgan Earp]
- Spock: Captain, since we have seen that death is the one reality in this situation, I seriously suggest you reseat yourself immediately, without moving a muscle of either hand. If I remember correctly, that would involve you in what was called 'the fast draw'. It initiated unfortunate events.
- Spock: [mind-melding with McCoy] The bullets are unreal. Without body. They are illusions only. Shadows without substance. They will not pass through your body, for they do not exist.
- McCoy: [in a trance] They do not exist.
- Spock: [mind-melding with Kirk] Unreal. Appearances only. They are shadows. Illusions. Nothing but ghosts of reality. They are lies. Falsehoods. Specters without body. They are to be ignored.
- [Chekov has been shot dead]
- Spock: Gentlemen, there is one thing which requires the immediate attention of all of us. Specifically, our future.
- Capt. Kirk: But not this minute, Spock. It takes us... a little longer.
- Spock: I understand the feeling, Captain.
- McCoy: You talk about another man's feelings. What do you feel, Spock?
- Spock: My feelings are not subject for discussion, Doctor.
- McCoy: Because there are no feelings to discuss!
- [Kirk and his landing party find themselves in a strange environment]
- Spock: Obviously, this represents the Melkotian's concept of an American frontier town, circa... 1880.
- McCoy: It's just bits and pieces. It's incomplete.
- Spock: Perhaps the Melkotians have insufficient data about this era.
- Capt. Kirk: Or perhaps this is all they require to complete the pattern of our death.
- Mr. Spock: The object is beginning to emit M-rays of a highly unstable nature, Captain.
- Capt. Kirk: Lieutenant, sound red alert. Mr. Chekov, deflector shields on full.
- Uhura: [background] All decks, red alert.
- Chekov: Deflectors on full, sir.
- Capt. Kirk: Gun crews, lock on target.
- Mr. Spock: Energy output increasing beyond measurable levels, Captain.
- Spock: Doctor, in your opinion, what killed Mr. Chekov?
- McCoy: A piece of lead in his body.
- Spock: Wrong. His mind killed him.
- McCoy: Well, come on, Spock. If you've got the answer, tell us.
- Spock: Physical reality is consistent with universal laws. Where the laws do not operate, there is no reality. All of this is unreal.
- McCoy: What do you mean, unreal? I examined Chekov. He's dead.
- Spock: But you made your examination under conditions which we cannot trust. We judge reality by the response of our senses. Once we are convinced of the reality of a given situation, we abide by its rules. We judge the bullets to be solid, the guns to be real. Therefore they can kill.