To reach the rendezvous with Degra in three days, "Enterprise" approaches a nebula that contains a subspace corridor defended by Kovaalan vessels. The corridor lets them traverse the distance in minutes. Suddenly, an older yet enhanced copy of "Enterprise" appears, captained by a half-Vulcan man named Lorian, who explains that after the Enterprise enters the corridor, it will destabilize, causing Captain Archer's version to travel 117 years into the past. Confronted with this situation, and not wanting to contaminate Earth's time stream, it then turns itself into a generational ship to await the Xindi crisis. Arriving on board, Lorian reveals that he is the son of Commander Tucker and Sub-Commander T'Pol. Archer also meets his great-granddaughter, Karyn Archer, who is part Ikaaran, as "Enterprise" will rescue her great-grandmother Esilia from a spatial-anomaly field.