Touchstone - S2-E14
Character mistake: The team are finding out who could have stolen the weather device from Madrona and find an energy spike at the same time SG2 are on a mission. "But SG2's mission is galaxies away from Madrona" Says Teal'c. At this time the only missions the teams could go on was in our own galaxy and couldn't be galaxies away.
Character mistake: When the kids are walking through the hallway, on the magician's poster, it says that he does Bar and Bat Mitzvahs. But the 'z' is missing, so it says Bar and Bat Mitvahs.