biographical article needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful. (May 2009) Marsha Thomason Born Marsha Lisa Thomason 19 January 1976 (1976-01-19) (age 35) Moston, Manchester, England Occupation Actress Years active 1993–present Spouse Craig Sykes (2009-present) 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..