It is revealed that the Ferengi have Universal Translators in their ears.
Goof: In an anachronism, when nurse Garland jumps into the jeep towards the end of the episode, her 1990s underwear can briefly be seen beneath her 1940s skirt.
Goof: During the scene when Odo reveals himself to the Ferengi, his hands are on Quark's shoulders. However, when the camera cuts to Quark, his shoulders are bare.
The name of the character Nurse Garland is a tip of the hat to the American actress Judy Garland, whose career was in full swing in 1947.
Goof: Time Index 39:45. When Odo attacks the officers, you see his hair messing up, despite the fact that its not really 'hair'. In the very next scene, it is back to normal.
Goof: When we see Quark's Treasure from the outside while on it's way to Earth, the top of the ship features a small pod, however in the photograph taken at the Roswell base the pod is missing.
Quark attempts to smuggle kemocite in the cargo hold of his ship, and it's this kemocite that enables them to travel through time. Kemocite was the chemical that was used as part of the Xindi weapon that was intended to destroy Earth in Enterprise's season 3 Xindi story-arc.
Goofs: There are numerous inaccuracies in the uniforms:
1) Shoulder patch is for the US Air Force but the AF was not a separate organization until September 18, 1947, two months after the July date implied by the calendar.
2) Only a few of the uniform ribbons are appropriate to WWII and even these are in the wrong precedence order.
3) Captain's bars are horizontal rather than vertical as is proper.
4) The nurse has no rank insignia at all and her lapel insignia are for enlisted personnel. Military nurses are always commissioned officers.
5) The general has both the US insignia and a branch insignia on his lapels. General officers should wear only the US.
Nitpicks: When the dog turns into Odo, who begins talking with the Ferengi, they are in the examination room with the one-way glass. It's hard to say which is more unbelievable, that no one is watching all this take place through the mirror, or that Odo wouldn't consider the possibility that someone is watching.
Faith Garland: I only hope that one day mankind will travel to the stars and take its place in a vast alliance of planets.
Faith Garland: Imagine the possibilities. Who knows what they could teach us? A few years from now, mankind could have rocket ships of our own. We could travel the galaxy, exploring new worlds and new civilizations.
Quark: What's that disgusting smell?
Nog: I think it's called 'tobacco'. It's a deadly drug. When used frequently, it destroys the internal organs.
Quark: If it's so deadly, then why do they use it?
Nog: It's also highly addictive.
Rom: How do they get their hands on it?
Nog: They buy it in stores.
Quark: They buy it? If they'll buy poison, they'll buy anything. I think I'm going to like it here.
Rom: Jettison the warp core. No, I tried that already. Emergency overrides are frozen.
Quark: Then we'll have to try something else, won't we?
Rom: The kemosite! If we vent plasma from the warp core into the cargo hold, we may be able to start a cascade reaction in the kemosite. Then we can modulate the reaction to create an inversion wave in the warp field and force the ship back into normal space! If I time it just right, I should be able to get us close enough to Earth to make an emergency landing.
Quark: Rom, you're a genius.
Rom: You think so?
Quark: How should I know? I have no idea what you're talking about. Just do it.
Quark: In the meantime let me give you some free advice, just to show you I'm on your side. You people should take better care of yourselves. Stop poisoning your bodies with tobacco and atom bombs. Sooner or later, that kind of stuff will kill you.
(about President Truman)
General Denning: That little piano-playin' Democrat's not as dumb as he looks.
Quark: My people have been watching your world for many years. We know all about you. Baseball, root beer, darts... atom bombs.
Quark: The three of us and millions of primitive humans. I like those odds!
(Kira picks up a springball racket)
Kira: Nog, where did you get this springball racket?
Nog: Out of a replicator?
Kira: Try out of my quarters. This is mine. I've been looking for it for two years.
Nog: And it was sitting here on the bar all along! That's incredible.
Kira: Quark, Rom and Nog together on that ship all the way to Earth. I'm glad I'm not going with them.
Sisko: Only one thing worries me... no one warned Earth that they're coming.
Quark: All I ask is a tall ship... and a load of contraband to fill her with.
Quark: We're harmless. All we want to do is sell you things!
This episode hints to the fact that Vulcans were the first race to initiate first contact with humans, even though the episode aired more than a year before the film Star Trek: First Contact.
Nog jokes to Jake that they've spent 2,147 hours together in their spot above the Promenade, and Quark, Rom, Nog and Odo travel back to Roswell, 1947. Writer Joe Menosky began including references to the number 47 in almost every episode of Star Trek since season four of The Next Generation. It is an in-joke, referring to The 47 Society at Pomona College in California, a college which Menosky attended.
Ferengi Rules Of Acquisition:
Number 203: "New customers are like razor-toothed Gree-worms. They can be succulent, but sometimes they bite back."
This is one of Armin Shimerman's favorite episodes. He got to captain a ship, speak in Ferengi, and make several Spock-like comments on humanity.
Megan Gallagher previously played Mareel in Deep Space Nine's season 2's "Invasive Procedures" and Jaryn in Voyager's "Body And Soul". And not only that, she was also the one who convinced Robert Picardo not to pass up auditioning for the Doctor on Voyager.
While examining his guidebook, Nog remarks how Gabriel Bell looks like Captain Sisko, a reference to the season 3 two-parter "Past Tense", in which Sisko has to assume the identity of Bell to preserve the timeline.
The Day After Roswell Quark's plan to sell advanced technology to Earth in order to accelerate technological development is a similar concept to book entitled The Day After Roswell (1995) written by Lieutenant Colonel Philip J. Corso, an intelligence officer who served on President Eisenhower's National Security Council staff and who headed the Army staff's Research & Development Foreign Technology Desk at the Pentagon. He claimed that from 1961 to 1963, he was involved in an Army project, directed by Lieutenant General Arthur Trudeau, to 'seed' American companies - such as IBM, Hughes Aircraft, Bell Labs and Dow Corning - with alien technology recovered from Roswell, without their knowledge as to the origins. He said that many alien devices were found at Roswell that "became precursors for today's integrated circuit chips, fiber optics, lasers and super-tenacity fibers." This episode aired the same year the book was published.
Nurse Garland: ...We could travel the galaxy, exploring new worlds and new civilizations.
This is a paraphrase of the famous opening monologue by Captain Kirk (Star Trek: TOS) and later Captain Picard (The Next Generation). In it, the line goes; "...to explore strange new worlds and seek out new civilizations...".
General Denning: Did you take care of that idiot in Roswell, who told the press we captured a flying saucer?
Denning is referring to Colonel William H. Blanchard's press release of July 8th, 1947, in which he stated that the Air Force "had in [their] possession a flying saucer." Blanchard was the commander of the 509th Bomb Group at Roswell Army Air Field. A second statement was released shortly thereafter which denied Blanchard's claim, saying that the debris was simply from a crashed weather balloon.
Quark: All I ask is a tall ship... (2)
This line was also quoted by James Kirk in the Star Trek: TOS episode "The Ultimate Computer", by Picard on Star Trek: Generations, during the holodeck promotion ceremony for Worf and is the ship's motto for the USS Defiant. It was also quoted by Captain Kirk in Star Trek V: The Final Frontier when he, Spock and Dr. McCoy see the new Enterprise in Spacedock.
Quark: All I ask is a tall ship...
This is a reference to a poem Sea-Fever by John Masefield (1878-1967):
"I must down to the seas again, to the lonely sea and the sky,
And all I ask is a tall ship and a star to steer her by,
And the wheel's kick and the wind's song and the white sail's shaking,
And a grey mist on the sea's face and a grey dawn breaking.
I must down to the seas again, for the call of the running tide
Is a wild call and a clear call that may not be denied;
And all I ask is a windy day with the white clouds flying,
And the flung spray and the blown spume, and the sea-gulls crying.
I must down to the seas again to the vagrant gypsy life.
To the gull's way and the whale's way where the wind's like a whetted knife;
And all I ask is a merry yarn from a laughing fellow-rover,
And quiet sleep and a sweet dream when the long trick's over."