Bloodlines

Teal'c's son Rya'c is to be implanted with his first Goa'uld larva on Chulak, so SG-1 goes to prevent it. However, Rya'c falls ill and can only be saved by a symbiote; Teal'c donates his own, and receives a stolen one for himself. The team also meet Teal'c's first teacher Bra'tac, formerly the greatest of all Jaffa warriors and now still a spry 133 years old, who had taught Teal'c that the Goa'uld were false gods.