Tessa was a granddaughter of Major General George S. Hammond. In 2000, Tessa and her sister Kayla were taken for a drive by NID operatives as an unspoken threat to Hammond to step down as commander of Stargate Command. (SG1: "Chain Reaction")

Their home phone number was first on Hammond's speed dial at Stargate Command, above even the President of the United States (speed dial #2).

Behind the scenesEdit

  • It has not been stated whether Tessa's surname is Hammond, it may have been her mother's maiden name.