P2C-257

P2C-257 is the designation of the planet which the Tok'ra Jacob Carter/Selmak was stationed on, about to 'detonate a weapon's grade shipment of Naquadah that would have vaporised a sizable chunk of the planet'. He didn't complete his mission because Samantha Carter and Daniel Jackson of SG-1 asked him to help them in rescuing Jack O'Neill and Teal'c, the occupants of the first (and last) X-301, whose ship had stopped responding to controls and turned towards Apophis's home world, a trip of several hundred years intended to kill the occupants of the ship. This convinced Jacob, so he took his ship and left.