Exodus

S4, E22: SG-1 pays a visit to the Tok'ra homeworld. They arrive at Vorash on Cronos' mothership — one of the spoils they claimed following their recent battle with him. At a meeting with Vorash's High Council it is revealed that SG-1 intends to lend the Tok'ra the enormous ship in order to help facilitate the Tok'ra's move to a new planet. Tanith is beside himself. Why wasn't he made aware of this plan? Teal'c informs him that he could not be trusted because he is after all a spy for the Goa'uld system lord Apophis. The Tok'ra has known all along. An enraged Tanith is taken away. The Tok'ra begins to move items up to the mothership. Preparations are underway for the extraction ceremony that will remove Tanith's Goa'uld symbiote. But amid all the activity Tanith escapes his cell and flees to the planet's desert surface. A search operation is mounted but no trace of him is found. Then the Tok'ra receives word: Tanith must have gotten a message out to Apophis who has assembled his fleet and is headed for Vorash. Maj. Samantha Carter and Jacob devise a plan that if successful could deal Apophis a crippling blow. They will 'gate the Tok'ra to another planet then load the stargate onto the mothership and leave Vorash. Once in position they will dial the address of the black-hole planet and then jettison the gate into the sun. Given proper timing this will cause the sun to go nova and destroy Apophis' fleet. Everything goes according to plan. They launch the black-hole stargate toward the sun and prepare to flee. Suddenly a Goa'uld ship decloaks and fires crippling them. Their weapons systems are disabled. Their hyperdrive is inoperative and Apophis is closing rapidly. More important the countdown has begun on a blast that will annihilate the entire solar system....