T'Pol was loyal to Captain Forrest. She assisted him in retaking the ship after Archer seized control in 2155. Forrest was ordered to continue with Archer's plans in any case. Forrest ordered T'Pol to ensure that Archer was killed on the mission to investigate the USS Defiant. After the ship rendezvoused with the ISS Avenger, T'Pol conspired with Mirror Phlox and Soval to disable and destroy the Defiant and give the ship's technical data to the rebels to cause the fall of the Empire. The plan was foiled by Hoshi and T'Pol was taken prisoner.