Isaac “Echo” Danforth was a 3rd Millennium human ADF agent for the GnT Intel and Assault Team that assaulted the Dalek Mining Operation on Kembel. Danforth was a member of the Ganymede Intelligence Section, along with Agent Alessa “Alpha” Tycho and the stealth AI droid Zed, who were sent as a scout mission ahead of Titan Section to assess the situation and report back. The mission was a success; however Danforth, Tycho and Zed all disappeared with their shuttle through a spatial anomaly en route to the Ganelon. Isaac has never met the Doctor.