At the command of Gerak, Yat'Yir went to Earth with his ship to capture Ba'al. However when one of Gerak's Jaffa was found dead on Earth, and a threat was made against the Farrow-Marshall Aeronautics Tower in Seattle, Stargate Command started searching for a ship. The ship was discovered by the Prometheus after Teal'c suggested searching behind Earth's Moon. After a Ba'al clone was captured, the ship left. (SG1: "Ex Deus Machina")