The Shroud

When SG-1 discovers a village tempted by Origin without any threats of destruction, they're in for a huge shock when they find out that their own teammate, Daniel Jackson, has been turned into a Prior of the Ori. After he is captured, the team must decide whether he can be trusted. Meanwhile, Daniel claims to be able to destroy the Ori once and for all using Merlin's weapon. SG-1 succeeds in finishing the weapon and sending it to the Ori galaxy, but reopen the Supergate in the process, allowing six more ships through and leaving it unclear whether or not the plan worked.