The hot chocolate seems to hurt neither Picard nor Ensign Sonya Gomez.
The hot chocolate stain on Picard's uniform changes - it initially is fairly small, then the camera cuts to Geordi and when it cuts back to Picard the stain has almost doubled in size.
When Picard gets into the turbolift on deck 36 and asks for deck 9, the motion indicators shows the turbolift going down, not up.
When Riker asks the computer where Captain Picard is after Q takes him to the shuttlecraft, the computer says, "The Captain is not on the ship." In later episodes when the computer is asked where someone is on the ship, it would say, "The Captain is not on board the Enterprise."
Both Picard and Q misstate the terms of the bet that Picard won in "Hide and Q". The agreement was that Q would keep out of humanity's way forever - it had nothing to do with Q being on the Enterprise or setting foot on it again, or troubling the Enterprise ever again.
When Worf shoots the first Borg, he falls to the ground, his left arm sprawled over his head and his right leg bent in an awkward position. In the next wide-angle shot, the dead Borg changes his position.
Worf doesn't do his job very well: when told to fire at the source of the tractor beam, he fires three separate times at other parts of the cube, and the Borg beam is only terminated when he finally decides to fire at the right spot.
Misdubbed audio: in Engineering when Worf says "Ensign!", Michael Dorn's lips don't move.
When Guinan goes into an office to view the Borg ship, they miscue the sound effect when she turns on the viewscreen - it makes a beeping noise just before she touches anything.
When on the Borg ship, one of the Borg drones is incorrectly facing into their alcove, rather than outwards.
When Q snaps his fingers to send the Enterprise back to their starting point, the Enterprise then turns around to the left. But in the view of the stars on the screen, they move from right to left, in the wrong direction.
Picard: (teleported aboard a shuttle) You promised that you would never trouble my ship again.
Q: I always keep my agreements, sir. Look...we're nowhere near your vessel.
Q: Ah, the redoubtable Commander Riker... (sees Worf) and Microbrain! Growl for me... let me know you still care!
(Picard to Q after his request to join the ship)
Picard: Ready and willing, able to serve. What would you do? Would you start as an ordinary crewman, hmmmm? What task is too menial for an entity?
Q: Sir, do you mock me?
Picard: Guinan, activate your viewscreen. I want you to monitor what's going on up here. I may need your input.
Guinan: I'm here. I can see the other ship.
Picard: You are acquainted with this life form?
Guinan: Yes. My people encountered them a century ago. Our cities were destroyed.... our people scattered across the galaxy. They are called the Borg. Protect yourself or they will destroy you.
Q: The Borg is the ultimate user, they're unlike any threat your Federation has ever faced. They're not interested in political conquest, wealth, or power as you know it. They're simply interested in your ship, its technology. They've identified it as something they can consume.
Q: You can't outrun them. You can't destroy them. If you damage them, the essence of what they are remains. They regenerate and keep coming. Eventually you will weaken, your reserves will be gone. They are relentless!
Q: They will follow this ship until you exhaust your fuel. They will wear down your defenses. Then you will be theirs. Admit it, Picard, you're out of your league. You should have stayed where you belonged.
Worf: A type of laser beam is slicing into the saucer section.
Riker: They're carving us up like a roast.
Q: (Guinan's) an imp..and wherever she goes..trouble always follows.
Picard: You're speaking of yourself, Q, not Guinan.
Q: Guinan? Is that your name now?
Q: I add a little spice, a little excitement to your lives, and all you do is complain!
Q: If you can't take a little bloody nose, maybe you had better go back home and crawl under your bed.
Q: It's not safe out here! It's wondrous, with treasures to satiate desires both subtle and gross. But it's not for the timid.
Picard: If we all die...here, now... you will not be able to gloat! You wanted to frighten us...we're frightened. You wanted to show us that we are inadequate...for the moment, I grant that. You wanted me to say that I need you...I need you!
Picard: Maybe Q did the right thing for the wrong reason.
Guinan: How so?
Picard: Well, Perhaps what we most needed was a kick in our complacency to prepare us for what lies ahead.
Injoke: The hand gesture that Guinan (Whoopi Goldberg) makes during her initial confrontation with Q in Ten Forward is the same hand gesture she made when she cursed Mister (Danny Glover) just before driving away with Shug in the movie The Color Purple.
This episode and "The Outrageous Okona" are the only ones of the season in which Diana Muldaur (Dr. Pulaski) does not appear.
The episode won two Emmy Awards, for Outstanding Sound Editing for a Series and Outstanding Sound Mixing for a Drama Series.
This episode introduces the Borg, the series' most well-known and most popular foe. The Borg was devised as an "ultimate enemy" after the Ferengi, originally conceived for such position, were felt to be too comical.
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