(written from a Production point of view)
Jim "Jimmy" Hart is a stuntman and stunt actor who served as an uncredited stunt double for Robert Duncan McNeill in the Star Trek: Voyager episode "Blood Fever".  He also had an uncredited appearance in DS9: "Trials and Tribble-ations". 
Hart is a two time nominee of a Taurus World Stunt Award. He received his first nomination for best specialty stunt for the opening sequence in Swordfish in 2002 alongside fellow Star Trek stunt performers Darrin Prescott, Chris Palermo, Jay Caputo, Tim Rigby, and Frank Lloyd and his second nomination in 2003 for best overall stunt by a stuntman for an action sequence in the sequel Blade 2.
He served as stunt double for Donald Sutherland in the action film The Italian Job (2003) and for Ron Perlman in the comic adaptation Hellboy (2004).
Hart has also performed stunts in several films such as Batman Forever (1995, with Rene Auberjonois and stunts by Anita Hart, Jennifer Caputo, and Diamond Farnsworth), Wild Wild West (1999, with Musetta Vander), the sequel The Flintstones in Viva Rock Vegas (2000, with Joan Collins, Kevin Grevioux, Scott L. Schwartz, and stunts by Elle Alexander, Mark Chadwick, Leslie Hoffman, Monica Staggs, and Spice Williams-Crosby), Michael Bay's blockbuster Pearl Harbor (2001), the action film Cradle 2 the Grave (2003, with Gabrielle Union and Michael Jace), Steven Spielberg's The Terminal (2004, with Jude Ciccolella), The Island (2005, with Ethan Phillips and Noa Tishby, and stunts by Stacey Carino, Doug Coleman, Bridgett Riley, Denney Pierce, Christopher Leps, and Spice Williams-Crosby), Poseidon and The Good German (both 2006), the sequel Spider-Man 3 (2007, with Kirsten Dunst and James Cromwell), Rush Hour 3 (2007), and is currently filming Steven Spielberg's Indiana Jones and the Kingdom of the Crystal Skull (set for 2008, with stunts by Jon Braver, Kevin Derr, Shauna Duggins, Ian Eyre, and Jeremy Fry).
He has also performed in television series such as Team Knight Rider (with regular John Kassir and stunts by Kane Hodder, Tom Morga, and Spiro Razatos), J.J. Abrams' Alias (coordinated by Shauna Duggins), Medium, The O.C. (2006, episode The Secrets and Lies, with regulars Melinda Clarke and Michael Nouri), Criminal Minds (2006, episode The Last Word, with Maury Sterling), and Cold Case (2006, episode Sandhogs, with Mike Genovese).