Goof: During the Q-Sisko boxing scene, Sisko doesn't turn his head after the first punch til Q's fist is way beyond his head.
Goof: As Ops begins to decompress, the Ops table can clearly be seen to be fully lit as usual after the power comes back on, but in the following close ups of Kira then Sisko, Dax and O'Brien, the whole table is again dark. It then immediately goes back to being lit as O'Brien walks behind everybody to raise the shields.
This episode is a continuation of the Next Generation's season 4 episode, "Qpid". In that episode, Vash (introduced in season 3's "Captain's Holiday") leaves with Q to explore the galaxy. Concluding that storyline, they arrive together on the station in this Deep Space Nine appearance.
We learn that Julian Bashir was salutatorian of his graduating class after mistaking a pre-ganglionic fiber with a post-ganglionic nerve during the orals. He claims that it was a trick question. However, he still got the pick of any assignment in Starfleet despite being second in his class.
Nitpick: As Chief O'Brien and his engineering team try desperately to open the runabout in order to release Dax and the Ensign, why didn't anyone simply use the station's transporter to beam them out? There was no mention of them not operating.
Nitpick: Major Kira refers to tritium as being "highly toxic". Tritium is just an isotope of hydrogen, just as combustible, but non-radioactive and no more toxic than ordinary hydrogen.
Q: (impersonating a Bajoran waiter at the restaurant) I'm a friend. I'm giving you friendly advice. She's nothing but trouble.
Bashir: (waiting for Vash to arrive) Really? Well, I don't see that it's any of your business who I see. In fact, I'm having dinner with her now.
Q: Are you sure you're up to it? You look tired.
Bashir: I feel fine!
Q: No, no, no, you look very, very, tired. (gives Julian a suggestive yawn, overpowering him)
Bashir: (yawning) Oh, God. Funny. I do feel a bit, um... a bit spent. Maybe I should, uh... Maybe I should go lie down for a, for a, for a minute. (yawns again as he staggers out of the restaurant and leaves)
Q: (to himself as he waves goodbye) Hopefully, by yourself for a change.
O'Brien: (upon seeing Q) Bloody hell!
O'Brien: We've got a problem, sir. I just saw Q on the Promenade.
Sisko: Q, here?
Kira: What's Q?
Sisko: A powerful and unpredictable entity. I was at a Starfleet briefing on him two years ago.
O'Brien: Blasted menace is what he is.
Q: I suppose it's my fate to be the galaxy's whipping boy. Oh, heavy is the burden of being me.
Sisko: If you're looking for sympathy, then you've come to the wrong place.
Q: Actually, what I was hoping for was witty reparte. But I can see I'm not going to get any of that, either. (turning to Vash) At least your beloved Jean-Luc knew how to turn a phrase.
Quark: I have nothing to hide. I'm selling quality merchandise to select clientele.
Odo: And what makes them so select?
Quark: They're all ridiculously wealthy. And not too bright.
Q: An abysmal place.
Vash: Tartaras V?
Q: Earth. A thousand years ago it had character. Crusades, Spanish Inquisition, Watergate. Now it's just mind-numbingly dull.
O'Brien: Vash and Captain Picard were friends. Close friends, if you follow my meaning. Seems they met on Risa a few years back. I figure she must be a special woman, being friends with the captain and all.
Sisko: Somehow she doesn't seem to be his type.
O'Brien: The captain likes a good challenge, sir.
Q: (Vash and Quark are holding an auction to sell her Gamma Quadrant merchandise) I hate to interrupt such a thrilling display of naked avarice, but I feel it's only fair to warn you that the station is hurtling toward its doom. It's very unlikely any of you will survive to enjoy your purchases. (Q pauses as crowd reacts) Just thought I'd mention it.
O'Brien: (to Q) Why don't you do something constructive for a change? Like torment the Cardassians.
Q: Do I know you?
O'Brien: O'Brien, from the Enterprise.
Q: The Enterprise? Ah yes, weren't you one of the little people?
Odo: I'll never understand this obsession with accumulating material wealth. You spend your entire life plotting and scheming to acquire more and more possessions until your living areas are bursting with useless junk. Then you die. Your relatives sell everything and start the cycle all over again.
Vash: And they weren't exactly thrilled to see you on Brax either. What did they call you, 'the god of lies'?
Q: They meant it affectionately.
Q: Quite a motley crew you've assembled here, Benjy!
Vash: (the doorbell rings) Come in!
Q: Go away! (he flicks Quark away)
Vash: Q, bring him back!
Q: What business could you possibly have with that disgusting little troll?!
Q: All right, fine. What is it you really want?
Vash: I want the life I had before I met you.
Q: And what a stellar life indeed! The eminent Vash - barred from the Royal Museum of Epsilon Hydra VII. Persona non grata on Betazed. Wanted dead on Myrmidon for stealing the Crown of the First Mother.
Vash: Dead or alive!
Q: Preferably dead!
Vash: You are arrogant, you're overbearing and you think you know everything.
Q: But, I do know everything.
Vash: That only makes it worse.
Q: Really Vash, I can't believe you're stil pining for Jean-Luc - that self-righteous do-gooder!
Q: Picard and his lackeys would've solved all this technobabble hours ago.
Q: (after Sisko decks Q in a fisticuffs contest) You hit me! Picard never hit me.
Sisko: I'm not Picard.
Q: Indeed not. You're much easier to provoke. How fortunate for me.
Q: (to O'Brien) Ah, the Enterprise! Weren't you one of the little people?
Colm Meaney was only credited as a guest star throughout The Next Generation's run. After the show, he was elevated to main cast member on Deep Space Nine.
Siddig El Fadil was shooting scenes for the The Next Generation episode "Birthright (1)" around the same time as this episode. This is the reason his character, Dr. Bashir, was missing for a significant amount here once Q induces him to sleep during the second half of the episode, eventually returning in the final scene.
Cirroc Lofton (Jake Sisko) does not appear in this episode.
This is the last time we see Vash in any Star Trek series.
This episode is Q's only appearance on Deep Space Nine.