Terry O ' Quinn Actor Terry O ' Quinn appeared as Admiral Erik Pressman in the seventh season episode in . Despite playing Riker ' s much older superior officer , in reality O ' Quinn is only one month older than actor Jonathan Frakes . One of O ' Quinn ' s most memorable roles was Jerry Blake ( aka " The Stepfather " ) in the 1987 horror film " The Stepfather " , a role he reprised in the 1989 sequel " The Stepfather II " , co - starring Meg Foster . Other notable roles include aviator Howard Hughes in the 1991 film " The Rocketeer " ( co - starring fellow " Trek " actors William O . Campbell , Paul Sorvino , Ed Lauter , Tiny Ron , Max Grodénchik , Clint Howard , and William Boyett ) , as well as regular roles on the Chris Carter - produced series " " and " Harsh Realm " . He also played the role of Captain ( and later Admiral ) Thomas Boone in ten episodes of CBS ' s court - room drama " JAG " ( upon the promotion , Mark Metcalf played Boone ' s replacement ) . O ' Quinn played three separate characters in " " , the first as Lt . in the second season episode " , " the second as SAC in the " X - Files " movie " " , directed by Rob Bowman , and the third as " " in the ninth season episode " , " credited as " Terrance Quinn . " " The X - Files " was executive - produced by John Shiban . O ' Quinn made his feature film debut in the 1980 drama " Heaven ' s Gate " , starring Brad Dourif . In 1988 , he played Alex McSween in the action western " Young Guns " , a film which also featured Brian Keith . In 1990 , he co - starred with George Takei in the war drama " Prisoners of the Sun " . The following year , he co - starred with DS9 guest star Tim Ransom and ENT guest star Dean Stockwell in the telefilm " Son of the Morning Star " . He played the role of Mayor John P . Clum in 1993 ' s " Tombstone " , which tells of the battle at the OK Corral . In 1996 , he co - starred with Whoopi Goldberg , Susanna Thompson , Virginia Madsen , Richard Riehle , Bill Cobbs , Thomas Kopache , Bill Smitrovich , and the late Brock Peters in " Ghosts of Mississippi " . In 2000 , he had a role in HBO ' s " Rated X " , alongside DS9 ' s Nicole de Boer . O ' Quinn had a recurring role as FBI Asstant Director Kendall on the J . J . Abrams - produced ABC drama " Alias " . He then began playing the mysterious John Locke on another of Abrams ' television series , " Lost " , alongside fellow " Trek " alumni Daniel Dae Kim , Titus Welliver , Fionnula Flanagan , Alan Dale and Sam Anderson . In the " Lost " episode " All the Best Cowboys Have Daddy Issues " , one of the other characters asks O ' Quinn ' s character if he has seen " Star Trek " , while talking about the redshirt curse of . O ' Quinn ' s character replies , " " No , not really . " " When the phenomenon is explained to him , he remarks that Kirk sounds like a " " piss poor captain . " " O ' Quinn earned his first nomination for his role on " Lost " in 2005 . In 2007 he received another nomination , which he won , beating out , among others , William Shatner , who was up for " Boston Legal " . " Lost " ended its run in May 2010 . Since then , O ' Quinn worked on the television movies " Hallelujah " ( 2011 , with Brett Cullen and Josh Clark ) and " Taken from Me : The Tiffany Rubin Story " ( 2011 ) and on the television mini series " Ring of Fire " ( 2012 ) . Besides a recurring role as Joe White on CBS television remake of " Hawaii Five - 0 " ( 2011 - 2012 , alongside Daniel Dae Kim ) , O ' Quinn more recently had guest parts in episodes of " Falling Skies " ( 2012 , with Matt Frewer ) and " 666 Park Avenue " ( 2012 , with Vanessa Williams ) .