(written from a Production point of view)
David Jean Thomas is an actor who appeared in 2009's Star Trek.  He previously worked with Star Trek director and producer J.J. Abrams on the latter's television series, Alias, in the fifth season episode, "Prophet Five" (along with Art Chudabala and Leon Russom).
Thomas has been acting steadily since the early 1990s, appearing in such films as Posse (co-starring Robert Hooks, Tommy "Tiny" Lister, Jr., Bob Minor and Salli Elise Richardson), The Odd Couple II (with Ellen Geer, Richard Riehle and Daniel Zacapa), Fight Club (with David Andrews, Tim de Zarn, Zach Grenier, and Matt Winston), The Flintstones in Viva Rock Vegas (starring Joan Collins), The Crow: Salvation (starring Kirsten Dunst), Nutty Professor II: The Klumps (with Nikki Cox, Charles Napier and Andrea Robinson), Backflash (starring Colm Meaney, Michael J. Pollard and Mike Starr), Hellborn (with Tommy "Tiny" Lister, Jr. and Tracy Scoggins), and Ghost Rock (with Adrienne Barbeau and Craig Wasson). Some of Thomas' upcoming film credits besides Star Trek are the biographical drama The Soloist (with Stephen Root and Justin Rodgers Hall) and the action film G.I. Joe: Rise of Cobra (starring his Star Trek co-star Rachel Nichols).
His made-for-television movies have included Buffalo Soldiers (1997, with Bob Gunton) and Voodoo Moon (2005, with Jeffrey Combs). In addition, Thomas starred in and associate produced the pilot movie for The Privateers. Working with Thomas on this project were his Star Trek co-star Karl Urban and original Trek series star Walter Koenig.