Capture of Ba'al

In the aftermath of the Great Enlightenment, the final clone of Ba'al who was thought to be the real one was captured by the Tau'ri sometime in 2008.

Prelude
Ba'al seeked to end the Ori invasion and rebuild the Goa'uld Empire, captured Adria and took her as a host as part of a plan to gain control of her armies. He also killed most of his clones in the process, hoping to cover his tracks. Lt. Colonel Cameron Mitchell killed Ba'al during the capture of Adria, and the symbiote placed in her was soon removed. However, doubt was expressed over whether Ba'al was finally dead, fearing that one or more of Ba'al's clones may have survived.

The capture
At some point, the Tau'ri discovered where Ba'al was located and set out to capture him and secure him so that the last System Lord could be executed. After the capture, Major General Jack O'Neill and SG-3 took the last clone of Ba'al to the Tok'ra homeworld who was presuming put in stasis to prevent him escaping.

Extraction Ceremony
SG-3 and Jack O'Neill have transported the last of the Ba'al clones to the Tok'ra homeworld the location of which could at last be revealed to the galaxy – where the Extraction Ceremony was performed on the Goa'uld, thus ending the reign of the last of the System Lords. Where the ceremony lasted for three hours with SG-1 in attendance along with a heavy protection from both a Free Jaffa Nation fleet as well as the Tok'ra fleet to prevent any escape.

As the ceremony was being performed, Vala Mal Doran and Teal'c vanished. After them, the Tok'ra in the city and the city itself also began to vanish. Colonel Cameron Mitchell, Colonel Samantha Carter, and Dr. Daniel Jackson quickly rushed to the world's Stargate and dialed back to Earth. However, upon arriving on Earth they found themselves in an alternate timeline, where they learned that the original Ba'al was still alive and changing history who were able to stop his plans all together.

Unknown to the Tau'ri and the Tok'ra, the real Ba'al died at the hands of an alternate Colonel Cameron Mitchell after traveling back to 1939, completely eliminating him as a threat when he went back in time and killed Ba'al the timeline was finally fixed, and everything reverted to normal, the Extraction Ceremony in 2008 was put back on the original timeline and the last clone of Ba'al was finally killed, bringing the reign of the System Lords to an end.

Aftermath
The host survived the process and Vala Mal Doran, having previously been a host herself, offered to help him cope.