S10, E4: As SG-1 continues to piece together clues to the whereabouts of the elusive Ancient weapon that could defeat the Ori an alien vessel streaks into Earth's atmosphere towards the SGC. When the vessel does not respond to hails it is shot down and crash lands. To everyone's surprise the pilot is none other than Ba'al (Cliff Simon). Ba'al informs SG-1 that his clones which he had created to assist him are now turning against him and he is seeking SG-1's help in tracking them down and obliterating them. In exchange he promises to assist SG-1 by giving them the key to finding the planet on which the Ancient weapon is located. Realizing that Ba'al's clones might turn over the location of the weapon to the Ori the team sets to work capturing the clones and bringing them back to the SGC. Soon there are nearly 20 Ba'al clones in isolation at the SGC all claiming to be the real Ba'al. Before the team members are able to elicit any useful information from the clones they escape - turning Stargate Command into a battlefield.