(written from a Production point of view)
Jay Karnes (born 27 June 1963; age 50) is an actor from Omaha, Nebraska who portrayed Lieutenant Ducane in the Star Trek: Voyager episode "Relativity". His costume, including his rank pips, from this episode was sold off on the It's A Wrap! sale and auction on eBay. 
Some of his feature films he starred in include The Joyriders (1999, with Steve Bond and Angela Paton), The Next Best Thing (2000, with John Carroll Lynch, Fran Bennett, and Katelin Petersen), and Chasing 3000 (2006, with Seymour Cassel and Lori Petty).