Don't get me wrong, I love that this episode deals with two important issues: A Possible way for Teal'c and all Jaffa to finally be free of the need to carry an Infant Goa'Uld, and the actual personal history of the Tok'Ra.
New potential allies are found who offer a gift horse to SG-1: The Pangera. In exchange for a drug called "Tritonin" that can cure all ills and give people the perfect health of a Jaffa, all they want are the gate addresses... To Goa'Uld home worlds! Why would they want those? Who in their right mind would deliberately GO to a Goa'Uld world? Jack tries to explain to them, "Bad Idea", but they are fairly insistent. And then the other foot drops when Janet Fraser discovers that anyone who takes the drug, will have to take it forever or die horribly with no immune system.
The question being, how are they making this goo? Quinn basically falls into the answer: From squished up Symbiote-Juice. But, that is not even the big question, which is WHO are the Symbiotes coming from? This is one of the first times we ever get to see a Goa'Uld Queen, and this one is in very sorry shape. The Tok'Ra send two operatives to scope it out, and a secret is revealed that may jeopardize this new alliance, even the future of the alliance of the Tok'Ra with the "Tauri" (aka, Earthers).
Gwynyth Walsh (Be'Tor, of the "Duras Sisters" from Star Trek) is "Kelmaa" and she makes a great sacrifice in order to resolve a genetic problem with the Symbiotes: One that this queen is uniquely able to resolve, and her way of evoking the Queen's help in this matter is very honorable.
We've met another Queen, "Hathor", but she was inside of a Host. We have to ask, how in blazes can a queen fit into a Human Host without the Host looking oddly pear-shaped? Suspension of disbelief is required for this one story, because it is one of the best of the Quinn-Season stories, and becomes a pivotal episode in the scheme of all things SG-1.