When SG-1 lands on Altair, they are automatically processed by the incredibly advanced machinery of the sole surviving native, Harlan, who insists they are 'better' and can never go back. They return, only to be incarcerated when it becomes clear they are not themselves but cyborg copies. Once their energy runs out, they must return, but once again Harlan insists they can't ever leave. He needs needs help to keep the underground biosphere running under a planet totally non-viable above ground.
Did You Know?
When SG-1 first steps through the Stargate, Colonel Jack O'Neill welcomes everyone to "P3X-989", but in the scene after the opening credits, he calls the planet "PX3-989". This name seems to be correct as later in the episode, Major General George S. Hammond calls the planet "PX3-989" See more
References The Terminator
Written by Joel Goldsmith
and David Arnold See more