In 2000, while Dr. Daniel Jackson was missing, shifted out of phase with the world by the crystal skull, Kayla phoned Hammond to ask if he would be able to attend her school play. He regretfully informed her that he wouldn't because they were searching for a good friend of his. Daniel, who was invisibly present in Hammond's office during the call, would later use that information to convince Hammond that he was communicating through his grandfather, the only person aware of Daniel's presence. (SG1: "Crystal Skull")
- In an alternate timeline where the Earth is destroyed when it is abandoned by its allies due to the rogue NID operation not being exposed, Tessa and Kayla are evacuated through the Stargate to the NID Alpha Site. General Hammond sees them both off and refuses their pleas to come with them. (Stargate SG-1: Apocalypse: Hostile Ground)
Behind the scenes
- It has not been stated whether Kayla's surname is Hammond, it may have been her mother's maiden name.