The car Samantha Carter drives is a 1961 Volvo P1800.
First episode with Eric Breker as Colonel Reynolds, now a senior officer at Stargate Command, a recurring role Breker will keep for the rest of the series. The character was seen earlier as a Major working at Area 51.
Orlin gives Major Carter an emerald saying that it represents her birth month. That means that Samantha Carter was born in May.
This episode introduces Colonel Frank Simmons played by John de Lancie who is famously known for playing Q on multiple Star Trek series. Q was a nearly omnipotent being much like Orlin in this episode.