- Doctor Bashir: [about the appearance of early Klingons] Those are Klingons?
- Odo: Mister Worf?
- Worf: They are Klingons, and it is a long story.
- O'Brien: What happened? Some kind genetic engineering?
- Doctor Bashir: A viral mutation?
- Worf: We do not discuss it with outsiders.
- Worf: Where did you get that... 'thing'?
- Odo: From a man named Cyrano Jones. He told me tribbles like everyone. This one doesn't seem to like you.
- Worf: [shouting] The feeling's...
- Worf: [composing himself; softer] ... is mutual. They are detestable creatures!
- Odo: Hm... interesting. It's been my observation that most humanoids love soft furry animals; especially if they make pleasing sounds...
- Worf: They do nothing but consume food and breed. If you feed that thing more than the smallest morsel, in a few hours you'll have ten tribbles then a hundred then a thousand.
- Odo: Calm down.
- Worf: They were once considered mortal enemies of the Klingon Empire.
- Odo: This? A mortal enemy of the Empire?
- Worf: They were an ecological menace, a plague to be wiped out.
- Odo: Wiped out? What are you saying?
- Worf: Hundreds of warriors were sent to track them down throughout the galaxy. An armada obliterated the tribbles' home world. By the end of the twenty third century they had been eradicated.
- Odo: Another glorious chapter of Klingon history. Tell me, do they still sing songs of the great tribble hunt?
- Dulmur: Be specific, Captain, which Enterprise? There've been five.
- Lucsly: Six.
- Captain Sisko: This was the first Enterprise - Constitution-class.
- Dulmur: His ship!
- Lucsly: James T. Kirk.
- Captain Sisko: The one and only!
- Lucsly: Seventeen separate temporal violations; the biggest file on record.
- Dulmur: The man was a menace.
- [the crew has traveled back in time and is now wearing TOS-style uniforms. Sisko is wearing gold, O'Brien red and Bashir blue]
- Doctor Bashir: Wait a minute. Aren't you two wearing the wrong color?
- O'Brien: Don't you know anything about this period in time?
- Doctor Bashir: I'm a doctor, not an historian.
- Sisko: In the old days, operations officers wore red, command officers wore gold...
- Lt. Commander Jadzia Dax: And women wore less.
- [Dax appears behind them, dressed in a revealing TOS miniskirt-style uniform]
- Doctor Bashir: I think I'm going to like history.
- Dr. Julian Bashir: No one ever met my great-grandfather. This could be a pre-destination paradox. Come on, Chief. Surely you took elementary temporal mechanics at the Academy. I could be destined to fall in love with that woman and become my own great-grandfather.
- O'Brien: You're being ridiculous.
- Dr. Julian Bashir: Ridiculous? If I don't meet with her tomorrow I may never be born!
- Major Kira Nerys: [Hailing] Chief, are you ready for transport?
- O'Brien: Are we ever
- Major Kira Nerys: [Hailing] Stand by.
- Dr. Julian Bashir: You saw the way she looked at me. You can't just dismiss this.
- O'Brien: I can try.
- Dr. Julian Bashir: All right. Fine, but I can't wait to get back to Deep Space 9 and see your face when you find out that I never existed
- O'Brien: [chuckling]
- O'Brien: Me. Of all the people in the line-up he asks me who threw the first punch.
- Doctor Bashir: You lied to him.
- O'Brien: I lied to Captain Kirk! I wish Keiko could've been here to see it.
- [Sisko and Dax are getting an unexpected glimpse of Kirk and Spock]
- Lt. Commander Jadzia Dax: I had no idea.
- Sisko: What?
- Lt. Commander Jadzia Dax: He's so much more handsome in person. Those eyes!
- Sisko: Kirk had quite the reputation as a ladies' man.
- Lt. Commander Jadzia Dax: Not him. Spock.
- Sisko: [drags Dax away] Let's go.
- Arne Darvin: [about Klingons] At least they know how to make coffee, even if they are foul smelling barbarians.
- [spots Worf who gives him a stern look]
- Arne Darvin: Uh, sss-sorry!
- [leaves quickly]
- O'Brien: I wouldn't take it personally, Worf.
- Doctor Bashir: I rather like the way you smell.
- O'Brien: Yeah... sort of... earthy, peaty aroma.
- Doctor Bashir: With a touch of... lilac...
- [O'Brien and Bashir in the Enterprise's turbolift...]
- O'Brien: Deck 21.
- [nothing happens]
- O'Brien: Deck 21.
- [the turbolift is still not moving]
- O'Brien: I said deck 21!
- Doctor Bashir: Maybe if you said 'please'.
- [Sisko on the Enterprise bridge...]
- Sisko: Excuse me, Captain. Here's tomorrow's duty roster for your approval.
- Captain James T. Kirk: Lieutenant... er, Lieutenant...?
- Sisko: Benjamin Sisko, sir. I've been on temporary assignment here. Before I leave, I just want to say... it's been an honor serving with you, sir.
- Captain James T. Kirk: All right, Lieutenant, carry on.
- Sisko: Thank you, sir.
- O'Brien: Captain, I'm not sure we can get to K7's internal sensors.
- Sisko: Then you will have to manually scan every tribble on the station.
- O'Brien: There must be thousands of them by now.
- Doctor Bashir: Hundreds of thousands.
- Lt. Commander Jadzia Dax: 1,771,561! That's starting with one tribble, with an average litter of ten every twelve hours. After three days...
- Sisko: Thank you!
- Dr. McCoy: The nearest thing I can figure out is that they are born pregnant. Which seems to be quite a time saver!
- Lieutenant Commander Jadzia Dax: [reminiscing about young Leonard McCoy] I had a feeling he'd become a doctor. He had the hands of a surgeon.
- Korax: I didn't mean to say that the Enterprise should be hauling garbage. I meant to say that it should be hauled away *as* garbage!
- Dulmur: Captain, why'd you take the Defiant back in time?
- Captain Sisko: It was an accident.
- Lucsly: So you're not contending it was a pre-destination paradox?
- Dulmur: A time loop? That you were meant to go back into the past?
- Captain Sisko: Um... no.
- Dulmur: Good.
- Lucsly: We hate those. So - what happened?
- Captain Sisko: This may take some time.
- Dulmur: Is that a joke?
- Captain Sisko: No.
- Lucsly: Good.
- Dulmur: We hate those too.
- Doctor Bashir: Clearly we've been going about this search business all wrong, Chief.
- O'Brien: You're right. Why bother searching thirty decks when you can just plunk yourself down at the bar here and wait for Darvin to come to you?
- Odo: We have reason to believe that he'll return to this area.
- Doctor Bashir: Ah...!
- O'Brien: Ah, yes, the raktajino.
- Doctor Bashir: A vital clue that others might have missed. How fortunate it is that it has kept you stuck at this bar for the past three hours having drinks, while we've been crawling through conduits.
- Sisko: [unknowingly echoing a Kirk line from the original episode] Storage compartments... storage compartments...
- Chief Miles O'Brien: [On the bridge of the Defiant, immediately following the incident where Barry Waddle/Arne Darvin refers to Klingons as "foul-smelling barbarians", and Bashir muses that Worf's body odor includes a "touch of lilac"] Trust me. Next time you see him, just sniff the air and go "is that lilac?"
- Lt. Cmdr. Jadzia Dax: [laughing] Find somebody else! I have my own ways of torturing Worf.
- Capt. Benjamin Sisko: [O'Brien turns towards Sisko with anticipation, who responds with amusement] Don't look at me!
- Lt. Commander Jadzia Dax: Maybe we should beam over to the station to help Odo and Worf. We know Darvin was there a few hours ago.
- Sisko: I think it might be better if Chief O'Brien and Dr. Bashir go.
- Lt. Commander Jadzia Dax: But if we went, we might run into Koloth.
- Sisko: Exactly.
- Lt. Commander Jadzia Dax: [pleading] It's not as if he would recognize me! I'd love to see him at his prime!
- Sisko: Dax.
- [Dax is sulking]
- Sisko: Major, beam the Chief and the Doctor to K-7 and fill them in.
- Major Kira Nerys: [over communicator] Aye, sir.
- Lt. Commander Jadzia Dax: [pouting] It would have been fun.
- Sisko: Too much fun!
- Doctor Bashir: Captain.
- Sisko: [dressed in a gold TOS-style uniform] Well... Lieutenant, actually. I didn't want to push my luck.
- Captain Sisko: Are you sure you don't want anything?
- Dulmur: Just the truth, Captain.
- Captain Sisko: You'll get it. Where do you want to start?
- Dulmur: The beginning.
- Lucsly: If there is such a thing.
- O'Brien: [examining an Enterprise power relay] I'm afraid to touch anything. It's all cross-circuited and patched together - I can't make head nor tails of it.
- Doctor Bashir: Sounds like one of your repair jobs.
- [Bashir accidentally steps on a tribble]
- Doctor Bashir: [picks him up] I'm sorry about that, little fellow. Who left you out here all alone?
- O'Brien: [looks up the corridor] He's not alone...
- Lieutenant Commander Jadzia Dax: Come on, Benjamin, are you telling me you're not the tiniest bit interested in meeting one of the most famous men in Starfleet history?
- [Sisko and Dax are frantically scanning tribbles in the grain bin for the bomb, throwing them aside as they scan]
- Mr. Spock: [inspecting a tribble] They seem to be gorged.
- Nilz Baris: *Gorged*? On *my* grain? Kirk, I'm going to hold you responsible! Must be thousands of them!
- Captain James T. Kirk: Hundreds of thousands.
- Mr. Spock: One million, seven hundred seventy-one thousand, five hundred sixty-one.
- [Sisko and Dax share a look for a moment as Spock continues, and resume scanning]
- Mr. Spock: That's assuming one tribble, multiplying with an average litter of ten producing a new generation every twelve hours over a period of three days.
- Captain James T. Kirk: As Captain I want two things done: first, find Cyrano Jones and second...
- [he looks up irritated, as tribbles keep falling on him from the storage compartment]
- Captain James T. Kirk: ...close that door!
- [last lines]
- Captain Sisko: I'm open to suggestions, people.
- Lt. Commander Jadzia Dax: We could build another station...
- [on how to deal with the growing tribble population on DS9...]
- Sisko: [Sisko and Dax are on the Enterprise, discussing the plan to find Arne Darvin's tribble bomb with Odo, Worf, O'Brien, and Bashir on the Defiant] Dax and I will take care of the Enterprise. The rest of you beam over to K-7 and start searching there.
- Odo: Understood. But, I think Mr. Worf should remain here. It seems he's... allergic to tribbles.
- Sisko: Excuse me Captain, here's tomorrow's duty roster for your approval.
- Captain James T. Kirk: Lieutenant, uh Lieutenant?
- Sisko: Benjamin Sisko, sir. I've been on temporary assignment here. Before I leave I just want to say... it's been an honour serving with you, sir.
- Captain James T. Kirk: All right, Lieutenant carry on.
- Sisko: Thank you, sir.
- Lt. Commander Jadzia Dax: I guess the difference between you and me is I remember this time. I lived in this time. And it's hard to not want to be part of it again.