Fallen

S7, E1: SG-1 SG-3 and SG-5 gate to the address where they find the nomadic tribe and Daniel Jackson. But Daniel doesn't remember O'Neill Carter or Teal'c and he's not sure he wants to remember who he is because he feels he might have done something wrong. Carter convinces Daniel that he was a very good person and to return to SG-1. The team theorizes that Daniel was expelled from the race of Ascended beings by his benefactor Oma after he interfered in human affairs on Abydos.