Marsha Lisa Thomason (born 19 January 1976) is an English actress, who is known in the United States for playing Nessa Holt in the first two seasons of the NBC series Las Vegas, for her recurring role on ABC's Lost as Naomi Dorrit, and for playing FBI agent Diana Barrigan on USA Network's White Collar. Description above from the Wikipedia article Marsha Thomason, licensed under CC-BY-SA, full list of contributors... see more