Episode 106 of "Stargate-SG1"
s05e18 The Warrior

K'tano, a charismatic Jaffa leader who defeated his own weak System Lord, Imhotep, tries to rally his people against the Goa'uld, and seeks to forge an alliance with Earth. K'tano creates a new Jaffa homeworld. His army is made from the armies of killed System Lords. SG-1 meets with him and supply them with Earth guns and weapons. However, as Jack starts to see K'tano's growing messianic complex he becomes worried. Teal'c and Bra'tac are swept along in K'tano's crusade despite Jack's misgivings. Teal'c is sent on a suicide mission against the System Lord Yu, who readily defeats him. It turns out one of Yu's rivals has set a trap using a ship K'tano believes will hold mutineers to his cause. Yu sets Teal'c free and he challenges K'tano to a death duel. It turns out K'tano has been taken over by Imhotep's symbiote and Teal'c manages to kill him – the whole thing has been a sham set up by Imhotep to strengthen his power base.