(written from a Production point of view)
Timothy "Bubba" Sitarz is a stuntman and stunt actor who played an Orion guard in the Star Trek: Enterprise episode "Borderland" and doubled actor Michael Nouri in the episode "The Forge". He received no credit for his stunt work. Sitarz also performed stunts in Star Trek: Voyager. His costume as double for Nouri was sold off on the It's A Wrap! sale and auction on eBay. 
Among his stunt resume are films such as Project Shadowchaser III (1995, with Musetta Vander, Brennan Dyson, and Chuck Borden), Gangland (2000, with Kristanna Loken, Dyanna Lynn, and Chuck Borden), Monkeybone (2001, with Whoopi Goldberg, Mary Stein, Scott Workman, and John Escobar), Planet of the Apes (2001, with David Warner, Cary-Hiroyuki Tagawa, Simone Boisseree, Eileen Weisinger, Kevin Grevioux, Erick Avari, Michael Jace, Ransom Gates, Austin Priester, Glen Hambly, and Darlene Williams), Men in Black II (2002, with Jack Kehler, Mary Stein, Kevin Grevioux, Paige Brooks, Derek Mears, Joni Avery, Gail Monian, and Ransom Gates), Daredevil (2003, with Leland Orser, Erick Avari, Jude Ciccolella, Kane Hodder, and Shauna Duggins), Starsky & Hutch (2004, with David Soul, Fred Williamson, Scott L. Schwartz, Rachael Harris, Ator Tamras, and Thom Williams), Epic Movie (2007, with Marty Murray and Scott Workman), and The Perfect Sleep (2007, with John Fleck, Julia Rose, Amy Jo Traicoff, and Scott Workman).
He did also stunts in television series such as The X-Files, V.I.P. (1999-2000, with Darlene Williams), Charmed (2003), Buffy the Vampire Slayer (1999), Angel, Crossing Jordan, Alias (created by J.J. Abrams), Without a Trace (stunt coordinated by Dennis Madalone), CSI: New York, CSI: Miami, 24 (2007), and The Unit (2007).