Yat'Yir accompanied Gerak to his first meeting with Major General Henry Landry on Earth. It was hoped that this informal session would open doors for an eventual treaty between Earth and the new Free Jaffa Nation. Yat'Yir did not trust Teal'c, and openly challenged him during table discussions. (SG1: "Origin") He was later sent to Earth in search of Ba'al by Gerak. He first captured Alex Jameson and tortured him for information. He later captured Ba'al and Gerak executed him but it was only a clone. (SG1: "Ex Deus Machina")