Te'rak once was a Jaffa loyal to Sokar until his death. After the Goa'uld where defeated he came into the service of Arkad who gave him a mission. That mission was to take a Tel'tak full of Naquadah to Earth. After Arkad was killed he planned to sell the Naquadah to Jacek but was killed by Dr. Daniel Jackson in his meeting with Jacek. (SG1: "Family Ties")