Cure

SG-1 visit Pangar, a planet once ruled by Ra. The Pangarans offer a wonder drug called Tretonin in exchange for gate addresses, but fail to mention that the drug is produced by using the progeny of the former Tok'ra queen Egeria. The drug also destroys the user's immune system, causing a crisis when supplies ran low. SG-1 calls in help from the Tok'ra Malek and Kelmaa. After Egeria is freed by the Tok'ra Kelmaa, she tells the remorseful Pangarans how to free themselves from the tretonin.