Stargate: The Ark of Truth

While digging on Dakara, SG-1 discovers a box that they believe contains the Ark of Truth, but before they can open it, Ori soldiers arrive, led by Tomin. Daniel tricks them into opening the box, but it is revealed to be a fake. When Tomin is ordered by a Prior to kill them, he refuses, and Mitchell kills the Prior, whose powers were being blocked by the Anti-Prior device. Shocked at the death of their Prior, the Ori soldiers surrender with Tomin returning to Earth with SG-1 where he resides at the SGC for a time.