The Fourth Horseman: Part 1
- Episode aired Sep 16, 2005
- TV-14
- 44m
The Ori unleash a deadly plague on Earth, prompting a powerful ally from SG-1's past to come to their aid.The Ori unleash a deadly plague on Earth, prompting a powerful ally from SG-1's past to come to their aid.The Ori unleash a deadly plague on Earth, prompting a powerful ally from SG-1's past to come to their aid.