COMMANDER: The matter of trespass into Romulan space is one of galactic import, a violation of treaties. Now I ask you simply, what is your mission here?
KIRK: Instrument failure caused navigational error. We were across the Neutral Zone before we realised it, then we were surrounded by your ships before we could get back.
COMMANDER: A starship? One of the Starfleet's finest vessels? You're saying instrument failure as radical as you suggest went unnoticed until you were well past the Neutral Zone?
KIRK: Accidents happen. Cut off back-up systems malfunction. We were due for overhaul two months ago.
COMMANDER: I see. But you were able to navigate with this malfunction?
KIRK: The error was corrected.
COMMANDER: But I doubt it'll clear you of espionage.
KIRK: We were not spying, Commander.
COMMANDER: Your language has always been most difficult for me, Captain. Perhaps you have another word for it.
KIRK: You're grossly mistaken if you think we were there
COMMANDER: Captain, if a Romulan vessel ventured far into Federation territory without good explanation, what would a
starbase commander do? You see, it works both ways. I hardly believe you are the injured party. Spock, come in.
(Spock and the guards enter.)
COMMANDER: The captain has made his statement.
SPOCK: I understand.
COMMANDER: I must admit some surprise on seeing you, Spock. We were not aware of Vulcans aboard the Enterprise.
SPOCK: Starfleet is not in the habit of informing Romulans of its ships' personnel.
COMMANDER: Quite so. Yet there are certain ships, certain officers, that are known to us. Your situation appears most interesting.
KIRK: What earns Spock your special interest?
COMMANDER: He is a Vulcan. Our forebears had the same roots and origins. Something you wouldn't understand, Captain. We can appreciate the Vulcans, our distant brothers. I have heard of Vulcan integrity and personal honour. There's a well-known saying, or is it a myth, that Vulcans are incapable of lying?
SPOCK: It is no myth.
COMMANDER: Then tell me truthfully now, by your honour as a Vulcan, what was your mission?
SPOCK: I reserve the privilege of speaking only when it will not violate my honour as a Vulcan.
COMMANDER: It is unworthy of a Vulcan to resort to subterfuge.
SPOCK: You're being clever, Commander. That is unworthy of a Romulan. It is not a lie to keep the truth to oneself.
COMMANDER: Then there is a truth here that remains unspoken.
KIRK: You've been told everything. There's nothing else to say.
COMMANDER: There is Mister Spock's unspoken truth. You knew of the cloaking device that we have developed. You
deliberately violated Romulan space with a blatant spy mission, by order of the Federation.
KIRK: We've been all through that, Commander!
COMMANDER: We have not even begun! There's no force that I can use on a Vulcan that will make him speak. That is a fact. But there are Romulan methods completely effective against humans and human weaknesses.
SPOCK: You would not resort to them, Commander. They would prove ineffective against the captain.
COMMANDER: Then they will leave him dead, or what might be worse than dead. But I will know your unspoken truths.
KIRK: Let her rant. There's nothing to say.
SPOCK: I cannot allow the captain to be further destroyed. The strain of command has worn heavily upon him. He's not been himself for several weeks.
KIRK: That's a lie!
SPOCK: As you can see, Captain Kirk is a highly sensitive and emotional person. I believe he has lost the capacity for rational decision.
KIRK: Shut up, Spock!
SPOCK: I'm betraying no secrets. The commander's suspicion that Starfleet ordered the Enterprise into the Neutral Zone is unacceptable. Our rapid capture demonstrates its foolhardiness.
KIRK: You filthy liar!
SPOCK: I am speaking the truth for the benefit of the Enterprise and the Federation. I say now and for the record, that Captain Kirk ordered the Enterprise across the Neutral Zone on his own initiative and his craving for glory.
KIRK: (having to be held back by the guards) I'll kill you, you filthy traitor! I'll kill you! I'll kill you!
SPOCK: He is not sane.