(written from a Production point of view)
Mark Chadwick (born 8 September 1961; age 56) is a stuntman who worked on Star Trek: Voyager, Star Trek: Enterprise, Star Trek Nemesis, and Star Trek. In 2010 Chadwick earned a Screen Actors Guild Award for Outstanding Performance by a Stunt Ensemble in a Motion Picture as part of the Star Trek stunt crew. The same year he received a Taurus World Stunt Award nomination in the category Best Fire for his performance on the film. His costume from the episode "Regeneration" was later sold off on the It's A Wrap! sale and auction on eBay.   
He has also performed stunts for such films as The Last of the Mohicans, Robocop 3, Air Force One, Alien: Resurrection, The Perfect Storm, Swordfish, We Were Soldiers, The Polar Express and The Aviator. He also did stunt work for several films based on Marvel Comics characters, including Spider-Man, Daredevil and the first two Blade films. He was awarded a Taurus World Stunt Award for a fire stunt he performed on another Marvel film, The Punisher. In addition, Chadwick does stuntwork for television shows. His past TV credits include The X-Files, Frasier, Profiler, Buffy the Vampire Slayer, and Charmed.
As an actor, he has performed small roles in films like Batman & Robin (co-starring John Glover), The Hot Chick and Date Movie. In 2000 he appeared as a circus performer in the TV movie Geppetto, which starred Trek regulars Rene Auberjonois and Brent Spiner and also featured Scarlett Pomers.