- [Spock stuns Sulu, who is psychotically waving a fencing foil]
- Spock: Take d'Artagnan here to sickbay!
- Riley: And now, crew, I will render 'Kathleen'... ONE MORE TIME!
- Capt. Kirk: [murmuring to himself] Please, not again.
- Riley: [over the intercom] Now, attention, cooks, this is your captain speaking. I'd like double portions of ice cream for the entire crew.
- Dr. McCoy: Jim, he was decontaminated, he's been medically checked, we've run every test we know for everything that we know...
- Capt. Kirk: That's not good enough!
- Dr. McCoy: Well, we're doing everything that's possible.
- Capt. Kirk: Bones, I want the impossible checked out, too.
- Riley: [over the intercom] Lt. Uhura, you've interrupted my song, uh... I'm sorry but there'll be no ice cream for YOU tonight.
- Capt. Kirk: Cut him off.
- Uhura: I can't, sir. There's no way to do it.
- Riley: Attention, crew, this is Capt. Riley. There will be a formal dance in the bowling alley at nineteen hundred hours tonight.
- [the Enterprise is spiraling out of control toward a disintegrating planet, crewmen are going loopy as flies, and Riley, barricaded in the engine room, has been singing off-key over the ship's intercom for the last several hours. Rand enters the bridge hurriedly as Kirk drags an hysterically giggling Leslie away from the helm station]
- Yeoman Rand: I would have gotten here sooner, sir, but Crewman Williams stopped me in the hall and...
- Capt. Kirk: Take the helm!
- Yeoman Rand: Sir?
- Capt. Kirk: [shoving her into the chair] TAKE THE HELM!
- Yeoman Rand: Yes, sir.
- [Kirk pulls a semi-comatose crewman away from the engineering section as Riley's song comes to an end]
- Riley: [over the intercom] And now... ONE MORE TIME.
- Capt. Kirk: [stalking over to a frantically-working Uhura] At least TRY cutting him off!
- Uhura: [shouting] Sir, if I could cut him off, don't you think I...?
- [She suddenly remembers to whom she's speaking and visibly gets her temper under control]
- Uhura: Yes, sir. I'll keep trying.
- Capt. Kirk: [ruefully] Sorry.
- [Uhura smiles back at him and gets back to work]
- Riley: [upon seeing that others have finally broken into Engineering to end his captaincy] No dance tonight.
- Uhura: [over the intercom] Entering planet's outer atmosphere, sir.
- Scotty: Captain!
- Capt. Kirk: What is it?
- Scotty: He's turned the engines off. They're completely cold. It'll take 30 minutes to regenerate them.
- Uhura: [over the intercom] Entering planet's outer atmosphere, sir. Ship's outer skin is beginning to heat, Captain. Orbit plot shows we have about 8 minutes left.
- Capt. Kirk: Scotty!
- Scotty: I can't change the law of physics! I've got to have 30 minutes!
- Riley: You rang, sir?
- Capt. Kirk: Who is this?
- Riley: This is Captain Kevin Thomas Riley of the Starship Enterprise. And who's this?
- Capt. Kirk: This is Captain Kirk. Get out of the engine room, Navigator. Where's Mr. Scott?
- Riley: I've relieved Mister Scott of his duties.
- Riley: Have no fear, O'Riley's here, and one Irishman is worth ten THOUSAND of you...
- Spock: You're relieved, Mister Riley! Lieutenant Uhura, take over this station
- Uhura: Yes sir!
- Riley: Now THAT'S what I like. Let the WOMEN work too! Universal SUFFRAGE...
- Spock: Report to sickbay, Mister Riley!
- Riley: Sick bay? Exactly where I was headed. Sir!
- Capt. Kirk: We've got to risk implosion. It's our only chance!
- Spock: It's never been done.
- Capt. Kirk: Don't tell me that again, Science Officer! It's a theory! It's possible! We may go up into the biggest ball of fire since the last sun in these parts exploded, but we gotta take that one in 10,000 chance!
- Uhura: [over the intercom] Bridge to Captain: Engineer asks "Did you find..."
- Capt. Kirk: Yes, I found Mr. Spock! I'm talking to Mr. Spock, d'you understand!
- Uhura: [over the intercom] Yes, sir. Three and a half minutes left, captain.
- Sulu: Stand, no farther. No escape for you. You'll either leave this war bloodied, or with my blood on your swords.
- Capt. Kirk: [to Spock] Love. You're better off without it, and I'm better off without mine. This vessel... I give, she takes. She won't permit me my life; I've got to live hers!
- Capt. Kirk: The purpose of a briefing, gentlemen, is to get me answers based on your abilities and experience. In a critical orbit there's no time for surprise.
- Scotty: Unless you people on the bridge start taking showers with your clothes on, my engines can pull us out of anything. We'll be warping out of orbit within a half second a' getting your command.
- Capt. Kirk: What is it?
- Sulu: Nothing but gravity increase, sir. Like the planet reached out and yanked at us.
- Capt. Kirk: Compensate.
- Uhura: All decks, alert system B-2. Repeat: go to Alert condition Baker 2. Seal off all main sections. Stand by.
- Capt. Kirk: Mr. Spock?
- Spock: Yes, sir.
- Capt. Kirk: The time warp. What did it do to us?
- Spock: We've regressed in time, 71 hours. It is now three days ago, Captain. We have three days to live over again.
- Capt. Kirk: [pleading wryly] Not those last three days.
- Spock: [reviewing Tormolen's personality file] His capacity for self-doubt has always been rather high. What puzzles me is what brought it to the surface with such force.
- [first lines]
- Capt. Kirk: Captain's log: Our position: orbiting Psi 2000, an ancient world, now a frozen wasteland about to rip apart in its death throes Our mission: pick up a scientific party below and observe the disintegration of the planet.
- Spock: Message from the Captain.
- Scotty: Tell him I'm doing my best. If I cut through the wrong circuits...
- Spock: We have fourteen minutes left.
- Scotty: Even if we were under a full-scale attack I couldn't move any faster, not and maintain a safety factor.
- Spock: At the rate you're proceeding, calculations show that you'll take a minute and a half more than we have left. You can't afford a safety factor.