The Tok'ra: Part 1 (S02E11)

Capt. Samantha Carter has a vivid dream, in which she sees through the eyes of Jolinar, the Tok'ra — rebel Goa'uld — who briefly inhabited her body before dying. Although her father, Jacob, is dying of cancer, Carter knows that she must go on the mission with Col. Jack O'Neill and the rest of the SG-1 team to find the Tok'ra on planet P34-353J. Upon their arrival, they meet a suspicious and heavily armed group of Tok'ra, but as Carter reveals her knowledge of their cause, relations begin to warm up. The team learns more about the Tok'ra — how they usually only inhabit willing hosts and do not use the Goa'uld sarcophagus — and Carter learns more about the relationship between Martouf and Jolinar, who were partners for nearly 100 years. There is even talk of an alliance with Earth ... but the fledgling trust is fragile and the outcome of these negotiations far from certain. (Metro-Goldwyn-Mayer (MGM))