Where To Stream Stargate SG·1 Season 9 Episode 10
The Fourth Horseman
- Aired September 16, 2005
- 60 Min
- Rated 7.9
- Number 79 Of 213 Rated Episodes
After an SGC officer returns to Earth after unknowingly being infected with the Ancient Plague, the virus quickly spreads throughout the United States. Not wanting the Ori to gain control of the Milky Way Galaxy, Orlin yet again descends to help Carter find a cure.