Corrected entry: When Colonel Ivanov's establishes a wormhole to the SGC gate at the beginning of the episode Carter tells Walter to page O'Neill and Hammond to the gate room. Walter responds, "Yes sir." The problem with that being that Major Carter's first name is Samantha.
Corrected entry: Whenever we see the stargate on a remote planet being dialed either from an incoming or outgoing wormhole, the inside ring (with the symbols on) never spins. I would imagine this is because it would cost too much money to bring all the equipment needed and use too much time to spin the inner ring on location, as the inner ring always spins when inside the SGC (the set of is obviously always set up). The sound of the ring spinning can even be heard.
Corrected entry: When the hallucinated Jonas is leading Dr. Kieran upstairs, a red light can be seen glowing on his hip where his Beretta is holstered. It looks as if Corin Nemec is carrying an Intar (a training weapon with a glowing red crystal in the grip) prop instead of a normal pistol. Can't be due to a hallucination - Dr. Kieran couldn't hallucinate a Goa'uld training weapon he'd never seen.
Corrected entry: The Replicator ship on which Daniel is being held prisoner is supposedly made entirely of Replicator blocks (a fact established in earlier episodes), yet only the walls of the set are made to look that way. The floor, visible repeatedly throughout the episode, is simply a concrete slab painted the same gray color as the block walls.
Corrected entry: When Dr. Fraiser has just told Carter about the rowboat and Carter leaves singing "Row your boat" the monitors on the wall next to Dr. Frasier show the other SG-1 members. The sticker that says "Jackson" is under O'Neill's monitor and "O'Neill" is under Dr. Jackson's monitor.
Corrected entry: In an episode of "Stargate: Atlantis", the team uses an Asgard beam to get rid of a Goa'uld parasite from a human. There are several occasions in "SG-1" after this event where they could have performed this procedure. (One is the episode "10x19" when they try to get Ba'al out of Adria, but fail).
Corrected entry: When Daniel is talking to Jack in the lift, he mentions all of the eyes that Anubis possesses, and makes a reference to the Eye of Tiamet (it doesn't say this in the subtitles, however). But in the episode "The Tomb", the Eye of Tiamet gets blown up along with the Russian soldier. So Anubis can't have it because it got blown up.
Corrected entry: After the Ancient device releases O'Neill and he collapses, Carter checks his pulse. She is kneeling to his left, yet reaches for the right side of his neck. Anyone trained in basic first aid and CPR (as Carter should be, with her field medic training) is taught that you always check the pulse on the same side of the body where you are sitting, so as not to risk compromising the person's airway by accidentally compressing the windpipe.
Corrected entry: In Season 9, Episode 9 ("Prototype"), there is a shot of the team exiting the stargate on the prototype's planet. The gate's event horizon (the watery-looking plane they walk through) has a flat base and the gate's rim (the stone circle) is shown disappearing into the ground, as if the base of the gate is slightly buried. It's been long established that the "wave" that bursts from the gate when it opens vaporizes any matter in its path. Therefore, the part of the ground that is covering the event horizon in this shot should have been vaporized the first time this gate opened, leaving a shallow trench stretching out in front of the gate.
Corrected entry: When SG-1 retrieved the Touchstone in Nevada after the thieves escaped through the second gate, why did they not just take the Touchstone back to Medrona using the second gate? Considering the world was on the verge of destruction, they thought they would have the time to fly back to Colarado and use the gate at stargate command. The NID guys escaped through the second gate right before SG1 got the Touchstone. And there was a DHD connected as well, so all they had to do was enter in the address on the DHD.
Corrected entry: Carter and O'Neil get trapped on a planet where the DHD does not work, they say that eventually they may get rescued by another team, however if the other team gets there then how are they themselves supposed to get back since they cannot dial home and neither can SGC dial up to them since it is said countless times that you cannot go through a wormhole unless you dialed it, i.e. it is a one way thing.
Corrected entry: Dr. Felger says that his assistant is good with numbers as she says something like "the probability of choosing the correct sequence of 7 non-repeating symbols from a pool from 39 is..." She can't be that good with numbers - the last symbol is known and is always the same (from earth), being the point of origin. So really they are choosing 6 symbols from 38.