Season ten of Stargate SG-1 began airing on July 14, 2006 on the US-American Sci Fi Channel. The final season of the series concluded after 20 episodes on March 13, 2007 on British Sky One, which overtook the Sci-Fi Channel in mid-season. Season 10 heavily featured the Ori invasion of the Milky Waygalaxy. With a tenth season, Stargate SG-1 has surpassed The X-Files (1993-2002) as the longest running scifi series on American television.
An Al'kesh is shot down and crashed on Earth. The pilot; Ba'al, wants SG-1's protection from his clones, and for payback, he will help SG-1 search for the Sangraal. However, SG-1 plans to capture the clones first to see which one is the real one.
After a planet's population is wiped out for embracing Origin, they suspect the Dakara superweapon is responsible. Also, SG-1 uses their first opportunity at commandeering an Ori warship from the planet, but discovers the Jaffa have ideas of commandeering it for themselves.
SG-1 travels to the planet where they believe the Sangraal is at to defeat the Ori. However, as soon as they arrive, Adria is hot on their trail, by posing as one of villagers to take the Sangraal away, but before they can get it, the have to pass a series of challenges, and finds Ba'al on the way.
Dr.Daniel Jackson has been sighted, but unfortunately he is now a Prior of the Ori. After capturing him, Jackson attempts to convince SG-1 that he was made into a Prior to get Adria to trust him, so he could wipe out the Ori once and for all, by sending the Sangraal to the Ori Home Galaxy.
SG-1 travel to P4M-328 to recover the Clava Thessara Infinitas, but discover that the Stargate there is a museum piece without a working Dial Home Device, and they can't go back. Things get worse when they are spotted by the natives. Believed to be rebels, SG-1 is forced to hold everyone hostage.
Adria is revealed to have survived the Sangraal and returns to the Milky Way. SG-1 use a cunning plan to capture her. However, their plan is thwarted when Ba'al gets her soon after, where he plans to make her relinquish some of her armies to his control.