Season 5 Episode 7 - Beast of Burden

When Daniel's friend Chaka is abducted by slave traders, SG-1 go through the stargate to rescue him. However when the opportunity to free him comes, Chaka refuses to leave, and Daniel discovers Chaka has become the leader of the other Unas slaves.

Once SG-1 escapes, with the help of the Unas, Chaka and his new followers stay behind to gain their freedom.