Junior

From SGCommand

Junior was the nickname members of the SGC gave to both of Teal'c's Goa'uld symbiotes. The first symbiote was given by Teal'c to his son Ryac, in order to save his sons life when he entered puberty, thus requiring the implantion of a symbiote for his own survival. SG-1 was able to acquire a second, much younger symbiote on the same mission, thus saving Teal'c's life as well. Its hatred for Teal'c was very great. At one point, Bra'tac removed Junior to cause the rite of M'al Sharran. Junior was killed when Teal'c was forced to share him with Bra'tac following an ambush that killed Bra'tac's symbiote and left both men seriously injured. Overtaxed, Junior died, forcing Teal'c and Bra'tac to go on Tretonin. (SG1: "Children of the Gods", "Bloodlines", "Crossroads", "Threshold", "The Changeling")