Uninvited

Season 10 · Episode 5 · First aired August 11, 2006

While assisting SG-3 on an offworld mission, Teal'c encounters a savage alien creature that is killing the inhabitants. SG-1 investigates and learns that a parasite is to blame. The team suspects that the Ori are responsible, but they are shocked when they find out the real cause.

Summary from TVmaze · CC BY-SA