Soon after arriving at the station, she scanned Vorlon Ambassador Kosh, in violation of the wishes of the Vorlon government, in order to try to discover the identity of his attacker. In Season Two, Lyta's experience with the Vorlon ambassador permanently changed her. She was recalled from her assignment a few weeks later and questioned regarding her encounter with Kosh. Interrogated for months by the Psi Corps, she eventually escaped and joined the Mars Resistance. While underground, she uncovered information regarding a mole among the Babylon 5 command staff, and returned to the station in late 2259 where she revealed Talia Winters as an unwitting mole for secret forces in EarthGov and Psi Corps. In season 3, Lyta travelled to the Vorlon homeworld, one of the few known humans to do so and live. There, she was modified by the Vorlons, given gill-like implants to allow her to breathe in a Vorlon environment, the ability to "carry" a Vorlon consciousness, and tremendously increased telepathic and psychokinetic powers. Even she did not initially realize the full potency of her new abilities. She returned to Babylon 5 as an aide to Ambassador Kosh. In Season Four, Lyta was key to eventual resolution of the Shadow War on Coriana 6, serving as the vessel through which Sheridan and Delenn confronted the elder races and forced them to leave the galaxy. Immediately after the Shadow War, she was part of the expedition to the Shadows' homeworld of Z'ha'dum. Using unknown abilities and implanted instructions from the Vorlons, she triggered the destruction of the planet to spite Alfred Bester and to prevent Shadow technology from falling into the wrong hands. However, after the conclusion of the Shadow War, she found herself unwelcome and had difficulty finding employment. She would go on to play a decisive role in the end game of the Earth Civil War, triggering the Shadow-modified telepaths smuggled aboard Earth ships to disable the fleet at Mars. In Season Five, Alexander became romantically involved with Byron, revealing to the telepaths that they had been created by the Vorlons as weapons for their war with the Shadows. After Byron's death, Alexander was inspired by his cause to create a homeworld for telepaths, and became the leader of a movement sponsoring violent resistance against the Corps. Lyta also began to more thoroughly explore the abilities the Vorlons had given her. She was eventually arrested aboard Babylon 5 for supporting terrorism by John Sheridan. Alexander then struck a deal with Michael Garibaldi to help her avoid prosecution, as well as provide funding for her cause.