Stargate SG-1 (1997) - 15 mistakes in series 1

Factual error: Earth's Stargate is dialed up more then once in series 1. Mostly in the first episodes, the passive gate is also shown with a rotating dialer ring when being called. This is not correct. The called gate only illuminates the chevrons. (This is classed as a 'factual' mistake within the show, not a 'continuity' error, and the option to change type has been removed.)

Continuity: Kawalsky's rank changes. At the beginning of the episode, he wears the rank insignia of a Captain. However, when his is in dress blues for mission briefing he has on Major insignia. Then in the meeting after the Abydos, he's back to wearing Captain bars.

Factual error: Carter claims that the gates shift position because of the expansion of the universe. Gravity sources within a galaxy completely compensate for such expansion. The gates would still experience "stellar drift", which is mentioned earlier in the same episode. Stellar drift occurs because stars orbit the galactic center independently.

Revealing: When Daniel, Jack, and Sam first meet the robed Jaffa in the woods, you can see the camera light in Daniel's glasses.

Revealing: When Apophis' queen goes back into the female Jaffa, it is obvious that the film footage was just played in reverse.

Other: When O'Neill first goes to visit Teal'c in his cell the symbol of Apophis on Teal'c's head is upside down.

Continuity: When Kawalsky is on the operating table, there is a shot of the clock showing 19 minutes after the hour. The next shot is of Carter and Daniel talking, then the shot returns to the surgery and the clock says 23 minutes.

Revealing: When Hathor turns Jack into her first new Jaffa, you can see the line between his chest and the prosthetic that gives him the Jaffa "pouch".

Revealing: When Carter is looking up Hathor on the Internet, the address bar says that the web page is on the C drive of the computer. That is a really stupid mistake, since it is extremely easy to hide the address bar.

Plot hole: After Cassandra has her first "heart attack" you see her in her room. Why isn't there one of those heartbeat monitors in her room?

Revealing: When Daniel is talking to Teal'c in the jail cell, you can see a camera light reflected in Daniel's glasses.

Revealing: When Daniel is talking to the leader of the Tolan, you can see the camera light reflected in his glasses.

Continuity: At the beginning of the episode, O'Neill refers to the planet as P3X-989. When he awakes as an android, he says "Welcome to PX3-989." The P3X becomes PX3.

Continuity: When the Jacks are talking to each other right at the end, the camera goes back and forth from looking over each of their shoulders at the other one. If you look closely, the false Jack's earlobe structure changes when we see him from behind.

Other: When attempting to dial out about 26 minutes into episode, the Earth gate point of origin symbol locks (indicating that all the symbols are finished encoding). But then "chevron 2 encoded" is announced.