Jack O'Neill (android)

Jack O'Neill was an android created by Harlan in the image of Colonel Jack O'Neill, along with doubles of the rest of SG-1. The team were forced to remain on Altair and the duplicate O'Neill told the "real" one that they would bury the Altair Stargate.

Instead, O'Neill's double demonstrated that, in General Hammond's words, he was as good at following as his "real" counterpart. He and the rest of the duplicate SG-1 went on missions themselves, until they were captured by Cronus on Juna. The "real" SG-1 came to the rescue and, with their doubles, managed to save the planet, but every member of the double SG-1 was killed in someway.