Mallozzi gave an interview, and this came up about the character of Martouf possibly being brought back (but too late now; sorry):
I wanted to do a story in which SG-1 discovers the Tok'ra have been working on a last-resort weapon, a chemical agent that specifically targets symbiotes," Mallozzi said. "Season Five's 'Summit' was an early attempt to bring Martouf back, albeit with a decidedly different spin. The basic story had SG-1 gating to a world ruled by Yu and finding hundreds of dead Jaffa with no external wounds. As SG-1 searches Yu's abandoned palace, they are captured by the planet's inhabitants, former slaves to the Goa'uld, who now serve a new master -– none other than Martouf.
Having been driven mad by numerous attempts to remove the za'tarc device from his brain, he escaped from a stasis chamber on the Tok'ra homeworld with the chemical and has plotted revenge against both Goa'uld and Tok'ra alike.
"Ultimately, we didn't go down that road because the others felt it would have gone against everything Martouf's character had stood for to make him a villain. While I can't disagree, I still hold JR would have made a great villain."
Martouf may have returned in the mid-Season Five two-parter in another (less villainous) way, but actor JR Bourne was committed to another project and could not reprise the role.
I wanted to do a story in which SG-1 discovers the Tok'ra have been working on a last-resort weapon, a chemical agent that specifically targets symbiotes," Mallozzi said. "Season Five's 'Summit' was an early attempt to bring Martouf back, albeit with a decidedly different spin. The basic story had SG-1 gating to a world ruled by Yu and finding hundreds of dead Jaffa with no external wounds. As SG-1 searches Yu's abandoned palace, they are captured by the planet's inhabitants, former slaves to the Goa'uld, who now serve a new master -– none other than Martouf.
Having been driven mad by numerous attempts to remove the za'tarc device from his brain, he escaped from a stasis chamber on the Tok'ra homeworld with the chemical and has plotted revenge against both Goa'uld and Tok'ra alike.
"Ultimately, we didn't go down that road because the others felt it would have gone against everything Martouf's character had stood for to make him a villain. While I can't disagree, I still hold JR would have made a great villain."
Martouf may have returned in the mid-Season Five two-parter in another (less villainous) way, but actor JR Bourne was committed to another project and could not reprise the role.