Like most characters in the Terran Empire, the mirror Archer was treacherous, cunning and scheming. He led a mutiny against Forrest and took over "Enterprise". However, with the help of T'Pol and other Vulcans, Forrest was freed and retook the ship. Archer surrendered, but had locked the ship's navigation controls so its heading could not be altered. His reason for the mutiny was brought to light as he had been informed about a ship that seemed to be from another dimension. With the ship's course unable to be changed and Starfleet now intrigued by what Archer had become aware of, Forrest was ordered to investigate, he also had Archer punished in the Agony Booth for a then record of ten hours, giving the Commander only one hour to clean up and get ready for a staff meeting after his release. On arrival, they discovered the USS "Defiant", a Starfleet ship from 100 years into the future of the "normal" universe.