(written from a Production point of view)
Brian Markinson (born 14 September 1961; age 57) is an actor who appeared in four episodes of the three Star Trek spin-off television series Star Trek: The Next Generation, Star Trek: Deep Space Nine and Star Trek: Voyager. He was cast as Sulan for "Faces" prior to portraying Pete Durst in the episode immediately prior to it, "Cathexis". (Beyond the Final Frontier, p. 200) Markinson had previously auditioned for the role of The Doctor. 
He had a recurring role on the Canadian television series Da Vinci's Inquest, as did Gwynyth Walsh. He also appeared in the 1994 HBO movie White Mile with Robert Picardo, Jacqueline Kim, Dakin Matthews, Ken Jenkins, Dan Kern, Fionnula Flanagan, Dan Gilvezan, Gina Ravarra, Brett Porter, Ken Thorley, Don McManus, and Tom Lupo. In 2002 he played a supporting part in the mini-series Taken with Matt Frewer, Anton Yelchin, Gwynyth Walsh, and Rob LaBelle. Markinson made two separate appearances in the re-imagined Battlestar Galactica franchise, created by former Star Trek writer Ronald D. Moore, in a recurrent role on the 2010 spin-off prequel series Caprica, and in another part on the subsequent 2012 sequel television movie Blood and Chrome.