Other mistake: 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.Grumpy Scot
Plot hole: In episode "The Nox," where we first encounter personal shields, Teal'c says he never saw that before (pointing out that it is a new invention). Yet when Daniel and Jack attack Seth, he activates one. Seth was trapped on Earth for thousands of years. How did he get hold of that? (00:17:30 - 00:36:40)
Factual error: The star collapsing into a black hole suddenly seems to increase its gravitational pull on the planet that SG-10 is on. When an object collapses to a singularity, the pull it exerts on an object does not suddenly change because the mass, and therefore the strength of its gravity, has not changed.