She served an important function for her cell group as she worked in the command center. Lorraine was critical in the prevention of the Visitors from jamming the television transmission of the Resistance exposing John's true reptilian nature and personally arranged for a sky shuttle to help the resistance escape the Los Angeles Medical Center.
She and the rest of her cell group mounted a joint attack on the Los Angeles mothership and brought a special computer to disarm its Doomsday Device. Although her attempts to do failed, the weapon was disarmed by Elizabeth Maxwell. (V: The Final Battle)
Lorraine and the rest of her group returned to Earth, now contaminated with Red Dust, and went into hiding from the Visitors when they began the Second Invasion and began hunting for exposed Fifth Column agents. (V: The Series)