Roger Cross Roger R . Cross is the Canadian actor who played Tret in the episode . He is perhaps best known for his role as CTU Agent Curtis Manning on the action drama television " 24 " . Early life . Although he was born in Christiana , Jamaica , Cross moved to Burnaby , British Columbia , Canada when he was eleven . He graduated from Trinity Western University in Langley , British Columbia , with a degree in Aviation and General Studies . While waiting for work as a pilot in 1990 , Cross took on jobs as a stuntman and background extra on films , and studied acting at the Breck Academy in Vancouver . He decided to focus on an acting career following his experience on his first film , entitled " The International Rescue " . Television work . Cross made his first television appearance on a 1990 episode of the CBS drama series " Wiseguy " , on which DS9 guest actor Jonathan Banks was a regular . This was followed by an episode of " Neon Rider " in 1992 with Antoinette Bower . His first made - for - TV movie was NBC ' s 1993 drama " Miracle on Interstate 880 " , which was directed by Robert Iscove and which also featured Len Cariou and John Pyper - Ferguson . Cross was then seen in the CBS TV movie " Judgment Day : The John List Story " , which aired one day later ; this project starred Alice Krige . Between 1993 and 1994 , Cross played the recurring role of Officer Terry Cooper on the crime drama series " The Commish " . Fellow " Enterprise " guest star Kaj - Erik Eriksen was a regular on this series . Cross and Eriksen later worked together in the 1996 TV adaptation of " Captains Courageous " and in a 2005 episode of " The 4400 " ( along with Jeffrey Combs ) . In 1994 , Cross appeared in two TV movies starring Malcolm McDowell : " Seasons of the Heart " and " The Man Who Wouldn ' t Die " . That same year , he appeared in the second episode of the science fiction series " M . A . N . T . I . S . " along with Gregg Henry . In 1995 , he co - starred in the pilot episode for another hit science fiction series , " Sliders " , which starred John Rhys - Davies . Cross appeared in four episodes of " " , including three directed by Rob Bowman and one directed by Kim Manners , as well as appearing with actors Jerry Hardin , Daniel Benzali , and Kevin Conway . Cross has also appeared on such science fiction shows as " The Outer Limits " ( including an episode with John Savage and another with Marina Sirtis ) , " Millennium " ( with Megan Gallagher and Bill Smitrovich ) , " " , Gene Roddenberry ' s " Andromeda " , " Taken " ( with Matt Frewer ) , " JAG " ( with Zoe McLellan and Adam Grimes ) , and the new " Bionic Woman " ( starring Miguel Ferrer ) . Cross portrayed Thurgood Marshall in the 1999 TV movie " The Color of Courage " , which also featured David Andrews and Bruce Greenwood . That same year , Cross appeared in the CBS movie " Aftershock : Earthquake in New York " , along with Sharon Lawrence , Mitchell Ryan , and Mark Rolston . His later TV movies include 2001 ' s " Sole Survivor " ( with Glenn Morshower ) and 2002 ' s " Interceptor Force 2 " . " First Wave " and " 24 " . Cross was a regular on the series " First Wave " , which aired on the Sci - Fi Channel from 1998 through 2001 . On this series , Cross portrayed " Joshua , " an alien who assists Humans in preventing his race ' s invasion of Earth . One of Cross ' co - stars on " First Wave " was Rob LaBelle , who guest - starred on three episodes of . Cross played CTU ( Counter Terrorist Unit ) Agent Curtis Manning on the hit FOX series " 24 " for 45 episodes between 2005 and 2007 . Added at the start of the fourth season as a recurring character , Cross ' character proved popular enough that he was promoted to series regular status midway through the season . Throughout much of the series , his character was a partner and friend of the lead protagonist , Jack Bauer ( played by Kiefer Sutherland ) . Cross ' character was killed off by Bauer in the show ' s sixth season when he threatened to kill a reformed terrorist played by DS9 ' s Alexander Siddig . Cross worked with many other " Star Trek " alumni during his time on " 24 " , including Jude Ciccolella , Jonathan del Arco , Megan Gallagher , Gregory Itzin , Tim Kelleher , Jeff Kober , Tzi Ma , Glenn Morshower , Tony Plana , Albie Selznick , Raphael Sbarge , Bill Smitrovich , Keith Szarabajka , Faran Tahir , Ned Vaughn , Peter Weller , and Ray Wise . From 2012 to 2015 , Cross played recurring role of Detective Lucas Hilton on the series " Arrow " , co - starring Susanna Thompson . Other " Star Trek " alumni who have appeared in the same episodes as Cross include Brian Markinson and Jeffrey Nordling . Cross is also a regular member of the cast of the FX miniseries " The Strain " , starring Robin Atkin Downes as the voice of the primary antagonist . Film work . Cross made his first mainstream film appearance as a pilot in the 1993 comedy " Look Who ' s Talking Now " , which starred Kirstie Alley . He subsequently appeared in such feature films as " Dangerous Intentions " ( starring Corbin Bernsen ) , " Free Willy 3 : The Rescue " ( with Patrick Kilpatrick ) , and the Paramount Pictures thriller " Double Jeopardy " ( starring Ashley Judd and Bruce Greenwood ) . Cross co - starred with ' Dina Meyer in the 2001 thriller " Deadly Little Secrets " . He then had a supporting role in the 2002 action thriller " Ballistic : Ecks vs . Sever " , along with Gregg Henry . He also had a small role as a Secret Service agent in the second " X - Men " film , " X2 : X - Men United " , which starred Patrick Stewart , Famke Janssen , and Bruce Davison . Cross played the supporting role of Toail in the 2004 sci - fi action film " The Chronicles of Riddick " , which also starred Karl Urban . Cross then appeared in the 2005 comedy " King ' s Ransom " and the 2006 drama " World Trade Center " ; other " Star Trek " performers who appeared in the latter included Jude Ciccolella , Brad William Henke , and Donna Murphy . In 2008 , Cross ' film work included the comedy " Mad Money " , with Christopher McDonald and the remake of the classic science fiction film " The Day the Earth Stood Still " , with Robert Knepper .