History StargateSG1 / AToF

*** He gets his time travel in StargateContinuum.

** The death glider can fly in space and in atmosphere and is specifically designed to terrify enemies. It also has no autopilot, ejector seat, targeting systems, or friend-or-foe recognition, and relies purely on line-of-sight weapons. The SGC reverse-engineered the essential systems of the glider (engines, inertial dampeners, and so on) and added all the trappings of a modern jet fighter, as well as a short-range hyperdrive, creating the vastly superior F-302.

* FirstContactMath: The Asgard do not reveal their true selves to a people until they have demonstrated that they understand pi (the ratio of a circle's radius to its circumference), indicating that they have developed sufficient science to understand their existence as "aliens" and not "gods".

** The SGC refuses to give applied military technology to alien societies that are not bein threatened by outside alien invasion; they refuse to aggrivate the cold war o Langara by proving Jet propulsion or SAM launchers, but do offer medical supplies and support.

** By season six the SGC seems to draw the line at giving military technology to less-advanced cultures that aren't in direct conflict with more-advanced ones. In "Shadow Play" they refuse to aggravate a SpaceColdWar on Langara by trading jet fighters to the Kelownans for naquadria.

** The System Lords originally banded together to combat outside threats such as the Asgard, but still regularly battle for control of their individual domains.

* AlienNonInterferenceClause

* AliensSpeakingEnglish: Almost all TransplantedHumans speak English, even if they were transplanted before the development of English or from a territory where it is not commonly spoken even today. Most alien species have their own language, [[ConstructedLanguage occasionally featured heavily]], but most of them can also speak English at need when they need to communicate with any present humans. This fact is {{lampshaded}} in the 100th Episode, "Wormhole X-Treme!"; when told that there can not be red apples on an alien world, the prop guy responds "Why not? They all speak English."

** Usually justified. The stargate network was built by the Ancients, who were carbon-based, oxygen-breathing HumanAliens, and thus they were highly unlikely to put gates on worlds they themselves couldn't readily use. Also, Teal'c mentioned in "The First Commandment" that the Goa'uld {{terraform}}ed many planets since they rose to power. The aversions (e.g. Proclarush Taonas in "Lost City") tend to be the result of cataclysmic events in the interim between gate placement and the present day.

** Lampshaded at least twice. At one point Jack asks why [[CaliforniaDoubling they always look like Canada]].
*** When SG-13 is exploring [=P3X-666=] in "Heroes, Part 1", Col. Dixon takes bets on what they're going to find there. One team member pipes up with "trees". Dixon says he's disqualified for being a smart-ass.
** Subverted and averted in "Scorched Earth". The Enkarans are HumanAliens whom the SGC relocated to [=P5S-381=] because they required a thicker ozone layer than usual or ultraviolet light would make them gradually go blind. Meanwhile, the Gadmeer for whom the terraforming vessel was transforming the planet's ecology required an atmosphere that included both the extra ozone and high concentrations of hydrogen sulfide, because they were sulfur-based rather than carbon-based.

* AllYourBaseAreBelongToUs: In an alternate reality Daniel found in Season 1, Alternate!Teal'c leads an attack on Stargate Command through the front door. [[spoiler:He kills everyone except Daniel on his way to the Star gate.]]

* AerithAndBob:
** SG-1. Jack, Daniel, Sam, and Teal'c. Justified: the last one's an alien.
*** Similarly justified for the altered lineup for seasons nine and ten. Cameron, Daniel, Sam, Teal'c, and Vala.
** Offworld-born humans also get some of this. You mostly get names following the LawOfAlienNames like Narim, Odai Ventrell, Nyan, and Adan Corso. And then there's Jonas Quinn, who could be from the United States, and whose name inexplicably sounds less alien to American ears than his actor's does.
** It's also in play with Earth's space fleet. ''Prometheus'', ''Daedalus'', ''Odyssey'', ''Apollo'', ''[[Series/StargateUniverse George Hammond]]'', ''Korolev'', and ''Sun Tzu''.

* ClipShow: Done once a season. Except for season eight's "Citizen Joe", each clip show advanced the plot of the series, sometimes [[NothingIsTheSameAnymore radically]], by framing the clips as the Stargate Program being introduced and explained to people who had previously not known its details. This format was used to reveal the Stargate program to the United Nations Security Council in season six and a new incoming United States President in season seven. Like everything else on the show, parodied in "200".

* DidNotDoTheResearch: In the Episode 1969, O'Niell claims to be [[ImMrFuturePopCultureReference Captain Kirk of the USS Starship Enterprise]] and the officer he tries it on doesn't call him out on it - However, ''Series/{{Star Trek|the Original Series}} was already in its third season by this time.

* DidNotDoTheResearch: In the Episode 1969, O'Niell claims to be [[ImMrFuturePopCultureReference Captain Kirk of the USS Starship Enterprise]] and the officer he tries it on doesn't call him out on it - However, StarTrek was already in it's third season by this time.

* [[ArtisticLicenseMedicine Artistic License - Pathology]]: A minor case in "The Broca Divide". Leaving aside whether a disease -- even an [[ImportedAlienPhlebotinum Imported Alien Disease]] -- is capable of causing humans to regress to a primitive state, Dr. Fraiser calls the microorganism a virus. Viruses use cells to replicate, plain and simple. They do not consume chemicals in the bloodstream. If it had actually been a virus, antihistamines would have had absolutely no effect on it. She also calls it a "parasitic virus" at least twice. [[DepartmentOfRedundancyDepartment Viruses are parasitic by definition.]]
* ArtisticLicensePhysics: In "A Matter of Time", when a black hole "newly forms" from a pre-existing star, its gravity suddenly and inexplicably increases. An actual black hole's formation occurs when a star's mass collapses into a singularity, but its gravity doesn't suddenly increase as depicted in the episode, it has the same mass and gravity, just in a much smaller volume.

* ArtisticLicensePhysics: In ''A Matter of Time'', when a black hole "newly Forms" from a pre-existing star, it's gravity suddenly and inexplicably increases. An Actual Black hole's formation occurs when a star's mass collapses into a singularity, but it's gravity doesn't suddenly increase as depicted in the episode, it has the same mass and gravity, just in a much smaller volume.

* CannotTellAJoke: Teal'c. Humor, as the Jaffa understand it, [[JustifiedTrope is esoteric, to say the least.]] Plus, it loses some in translation.

* ComeWithMeIfYouWantToLive: Subverted in the season 5 episode "Desperate Measures", with a completely villainous variant. Colonel Frank Simmons says this basically word-for-word to the Goa'uld possessing Adrian Conrad -- after having put a couple of bullets from behind into Colonel O'Neill.

* CannotTellAJoke: Teal'c. Humor, as the Jaffa understand it, [[JustifiedTrope is esoteric, to say the least.]]

** When Mitchell is held captive by the Sodan in "Babylon" he briefly sees, but does not speak or interact with, the Prior that has come to convert them to Origin. In "The Fourth Horsemen," that Prior is revealed to be the source of the plague that is ravaging the Earth, and might also be the key to its cure.

* TheComputerIsACheatingBastard:
** O'Neill's simulation in "The Gamekeeper," which recreates a mission of his in [[ColdWar East Germany]] that turned horribly bloody. Each time O'Neil prevents a problem that arose in the real mission, the computer creates a ''new'' problem to impede progress.

* AmazonBrigade: The Hak'tyl (Liberation), a planet of refugee women Jaffa in the season 7 episode "Birthright". They reappear in "Sacrifices" and later as members of the Free Jaffa Nation.
** Also the group of female marines and airmen that Carter and Dr. Fraiser put together to fight Hathor in the eponymous episode.

* CurseCutShort: In "Moebius", when SG-1 gets taken out by a Jaffa grenade.

* ChekhovsGun: A hilarious literal example in "Emancipation". Early on, O'Neill fires his Beretta into the air to scare off a pack of wild dogs. [[spoiler:Later in the episode he trades it to the [[SpaceRomans Space Mongol]] chieftain Turghan to free Carter.]]

* TheComputerIsACheatingBastard: The training simulation in "Avatar" quite blatantly cheats when Teal'c is plugged in; it changes the rules of the game ''during play''.
** Also the simulation in "The Gamekeeper", most notably O'Neill and Teal'c's simulation of a prior mission by O'Neill in [[ColdWar East Germany]]. They kill the sniper on the roof, and gunmen appear behind the hedge. They machine-gun the hedge, and gunmen appear on the roof.

* ConLang: Goa'uld, the language of (obviously) the Goa'uld, Tok'ra, Jaffa and majority of the humans of the Milky Way. The language uses a subject-verb-object grammatical structure, but with a much simplified tense formation compared to English. The language has multiple writing systems, based on various ancient Earth writing systems (including Egyptian hieroglyphs and Linear-A), but most written Goa'uld seen on the show is a simple letter substitution, as opposed to actually being written in the language. The word "goa'uld" itself translates to English either as "gods" or "''children of the'' Gods"; its usage varies.
** Then there's "kree", which sometimes seems to make up half the Goa'uld vocabulary. It tends to mean something along the lines of "pay attention" or "come with me".

** Lampshaded another time in "Small Victories" by Thor, who had enlisted SG-1's help for exactly this reason.
-->'''Thor:''' It was your stupid idea, Major Carter.

* FateWorseThanDeath: Becoming a Goa'uld host. Imagine being trapped in your own body, being able to see and hear everything around you, but be powerless to do anything. Now imagine living through this for hundreds or even thousands of years. If you're ''lucky'', you'll go insane long before then.
** The Goa'uld Marduk was so abusive to his subordinates that his own priests rebelled. They locked him in his sarcophagus with a creature that ate him alive at a rate just slow enough for the sarcophagus to keep up.