(written from a Production point of view)
Trey King is an actor who appeared in three Star Trek productions as a background actor. His costume and his special effects Suliban scalp from the Star Trek: Enterprise episode "Detained" were sold off on the It's A Wrap! sale and auction on eBay.  
King studied acting under Bobbie Chance, Tracy Roberts, Estelle Harman Actors Workshop, and the Screen Actors Guild Conservatory and has appeared in several commercials and stage plays such as "I'm Not Rappaport", "The Foreigner", and "The Midnight Court" in California.
Beside his work on Star Trek, King had parts in the American Film Institute projects Butte County Lullaby, Hollow Men, The Skull Cup, and Harvest and was featured as a med tech in Ron Howard's drama Apollo 13 (1995) which also featured David Andrews, Clint Howard, Googy Gress, Max Grodénchik, Brett Cullen, Andy Milder, Geoffrey Blake, Kenneth White, Brian Markinson, Steve Rankin, Bruce Wright, and Tory Christopher.
Among his television work are an episode of Women of the House (1995) and the Diagnosis Murder episode "Trash TV" (1999, with Robert Ito). He was also featured in the television drama And the Band Played On (1993, with David Clennon, Ronald Guttman, Ken Jenkins, Dakin Matthews, Lawrence Monoson, Jeffrey Nordling, Saul Rubinek, Rico Bueno, Reg E. Cathey, Christopher Carroll, John Durbin, Richard Fancy, Keythe Farley, Jeff Hayenga, Thomas Kopache, Clyde Kusatsu, Rob LaBelle, Angela Paton, Sierra Pecheur, Miguel Perez, and Tom Schanley).