Great episode! It adds a lot to the series. The villanous character of Colonel John Symmonds (John de Lancie) is expanded upon. John de Lancie in my opinion, is one of the best actors from the Star Trek TNG, DS9 and Voyager series'. I am watching Stargate in sequential order on DVD, and this episode adds to the drama and suspense pertaining to the darker side of the government, interfering with the Stargate program.
I look forward to continue watching the series as these new, darker events unfold.
Definitely this is one you will not want to miss, and seems to be a precursor to more episodes with an X-Files flavor!