Tok'ra Kree!

SG-1, Martouf/Lantash, sometime around season 9 or 10. Rumors starts appearing about a friendly Goa'uld who rules a small domain in a distant part of the Milky Way. He has taken advantage of most of the Goa'uld being gone and has set himself up there. SG-1 goes to investigate and learns that it is someone they know! Martouf/Lantash, with amnesia after being treated as a zatarc, is alive. The Lantash that died was a clone, and one or more of the Tok'ra had lied to SG-1 and the rest of the Tok'ra. Are the liars really Goa'uld? Anyway, SG-1 must approach M/L and convince him to come back with them so he can be treated and get to remember.