Mark Rolston Mark Rolston is an actor who made his first appearance in the " Star Trek " universe in , playing Lieutenant junior grade Walter Pierce in the seventh season episode . He later appeared in two episodes of : in as Kuroda and in as Captain Magh . Rolston was born in Baltimore , Maryland and studied acting at the London Drama Center , making his stage debut in 1976 . In 1981 , he toured many US cities in the title role of " Richard II " for the National Shakespeare Company . He is known primarily for his multiple film roles , which are often villains . He is also known for his recurring roles in such television series as " Profiler " , " The Shield " , and " Cold Case " . Notable films . Both Rolston and actress Jenette Goldstein made their film debuts playing privates in the widely - acclaimed 1986 science fiction film " Aliens " . They later co - starred together in " Lethal Weapon 2 " , which also featured Sherman Howard . Rolston had a role in 1990 ' s " RoboCop 2 " , in which Peter Weller played the title role . This film also featured Bill Bolender , Roger Aaron Brown , Gabriel Damon , Robert DoQui , John Glover , Galyn Görg , Tzi Ma , Jeff McCarthy , and Phil Rubenstein , and was written by Frank Miller . Rolston then played a detective , along with Richard Riehle , in the 1993 thriller " Body of Evidence " . Michael Forest and Frank Langella were featured in this film , as well . Perhaps Rolston ' s best - known film role is that of " bull queer " inmate Bogs Diamond in the acclaimed , Academy Award - nominated prison drama " The Shawshank Redemption " . Many other " Star Trek " alumni had supporting roles in this film : Brian Brophy , Clancy Brown , Jude Ciccolella , Bob Gunton , Don McManus , William Sadler , and the aforementioned Bill Bolender . Rolston ' s subsequent film credits have included the 1996 action blockbuster " Eraser " ( with James Cromwell and Patrick Kilpatrick ) , the 1998 comedy " Rush Hour " ( with Tzi Ma ) . More recently , he was seen in the Academy Award - winning 2006 crime drama " The Departed " and the 2008 horror film " Saw V " , the fifth entry in the highly successful " Saw " franchise . Television work . Notable guest appearances . Rolston was seen in the pilot episode of the CBS mystery / drama series " Wiseguy " in 1987 , along with series regular Jonathan Banks . In 1989 , Leo Penn directed him in an episode of " Matlock " with Albert Hall and Glenn Morshower . Rolston appeared in four episodes of the mystery series " Murder , She Wrote " , between 1992 and 1995 . Among the actors he worked with on this series were Bairbre Dowling , Fionnula Flanagan , George Hearn , Richard Lynch , Dakin Matthews , Cyril O ' Reilly , the aforementioned Richard Riehle , Andrew Robinson , and Carolyn Seymour . Outside of his appearances on " Star Trek " , Rolston has guest - starred on several other science fiction television shows . He played Karl Mueller in the " Babylon 5 " episode " The Quality of Mercy " ( 1994 ) , along with series regular Bill Mumy . ( Andreas Katsulas was a regular on " Babylon 5 " , as well , but did not appear in this episode . ) The following year , he was seen on " Lois & Clark : The New Adventures of Superman " , which starred Teri Hatcher as Lois Lane . Rolston has also appeared in two episodes of the hit science fiction series " " . For his first episode , 1994 ' s " Red Museum , " he was directed by Win Phelps . He returned to the series in 2000 for the episode " Sein und Zeit , " playing a different role and working with Kim Darby and Spencer Garrett . His subsequent sci - fi TV guest appearances include episodes of " Harsh Realm " ( with Terry O ' Quinn and John Pyper - Ferguson ) , " Dark Angel " ( directed by Michael Rhodes ) and " The Dead Zone " ( starring Nicole de Boer and David Ogden Stiers ) . In addition , Rolston appeared in an early episode of the NBC medical drama " ER " ( with John Chandler and Christopher Darga ) , two episodes of the ABC drama " NYPD Blue " ( one with series regulars Gordon Clapp and Sharon Lawrence , the other with Clapp and John Billingsley ) , an episode of J . J . Abrams ' action drama " Alias " ( with Greg Grunberg and Keone Young ) , and the CBS crime drama " Shark " ( starring Jeri Ryan ) . He has also appeared on the first three " CSI " television series , including a recurring role on " CSI : Miami " ( see recurring roles below ) . Recurring roles . Rolston has played recurring characters on several television series . During the first ( and only ) season of " Brooklyn South " , he played Detective Lou Conroy . He appeared in three episodes , working with James B . Sikking and Titus Welliver , who were regulars on the series . Rolston then played Donald Lucas in several episodes of the mystery drama series " Profiler " . Among his co - stars on this series were Michelle C . Bonilla , Timothy Carhart , Dennis Christopher , Matthew Kimbrough , Julianna McCarthy , Christopher Michael , Stephanie Niznik , and James Read . Richard Compton directed one of Rolston ' s " Profiler " episodes . In 2003 , Rolston made several appearances on the FX drama series " The Shield " as private detective Gordie Liman . Fellow " Star Trek " alumni Michael Jace , Jay Karnes , and Benito Martinez were main cast members on this series . The following year , Rolston appeared in two episodes of " 24 " as Bruce Paxton . His character assisted in breaking into the home of Sherry Palmer ( played by Penny Johnson ) in search of evidence linking her to the killing of Alan Milliken ( played by Albert Hall ) . Other " Star Trek " performers appearing on " 24 " at the time were Alexandra Lydon , Glenn Morshower , and Zachary Quinto . Rolston played FBI Agent Glen Cole in three episodes of " CSI : Miami " , working alongside Michael Buchman Silver in two of them . One of these episodes also featured Cyia Batten and Scottie Thompson . In 2007 , Rolston played Ari Gordon in four episodes of " Cold Case " . regular Roxann Dawson is a producer on this series and also directed one of Rolston ' s episodes . In 2008 , Rolston appeared as the demon Alastair in two episodes of " Supernatural " , executive produced by Kim Manners . Other notable appearances . Rolston appeared in the 1998 mini - series , playing astronaut , after whom the was named . Others who appeared in the mini - series are Sam Anderson , David Andrews , Dan Butler , David Clennon , Ronny Cox , Brett Cullen , J . Downing , Ann Cusack , David Drew Gallagher , Jerry Hardin , Clint Howard , Daniel Hugh Kelly , John Carroll Lynch , Dakin Matthews , Kieran Mulroney , Conor O ' Farrell , Holmes R . Osborne , Ethan Phillips , Harve Presnell , Stephen Root , Alan Ruck , and Winona Ryder . Rolston had a supporting role in the 1997 TV movie " George Wallace " , along with Clarence Williams III and Cliff DeYoung . He also appeared in the 1999 TV movie " Aftershock : Earthquake in New York " with Roger Cross , Sharon Lawrence , and Mitch Ryan . Rolston ' s more recent TV movie credits include 2008 ' s " Jane Doe : Eye of the Beholder " with John Fleck , Julianna McCarthy , Natalia Nogulich , and Alan Oppenheimer . Other " Trek " connections . Additional projects in which Rolston appeared with other " Star Trek " performers include :