Lorian was the commander of a version of Enterprise NX-01 from an alternate timeline, in which Enterprise was thrown back in time from the year 2154 to 2037. He was the son of Vulcan science officer T'Pol and Human chief engineer Charles Tucker III, a conception made possible after Doctor Phlox found a way of combining the Vulcan and Human genomes. Lorian was influenced by both of his parents, and over his lifetime, he was able to balance emotion and logic.
Lorian's father died when he was fourteen, but Lorian taught himself engineering by reading his father's old logs. While Captain Jonathan Archer was on his deathbed, Lorian promised the captain he would continue his mission to stop the Xindi probe from attacking Earth. Upon Archer's death, Lorian became the captain of Enterprise.
Lorian's ultimate fate, as well as the fate of the rest of his crew, remained unknown. It was speculated by Archer and T'Pol that his ship was destroyed, was able to escape, or even that, due to both crews' success in changing the timeline, his ship might have been erased from history. (ENT: "E²")
