William Mapother
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William Mapother
William Mapother
William Mapother 2014.jpg
Mapother in 2014
William Reibert Mapother Jr.

(1965-04-17) April 17, 1965 (age 55)
Alma materUniversity of Notre Dame
Years active1988-present
RelativesTom Cruise (cousin)

William Reibert Mapother Jr.[1] (; born April 17, 1965) is an American actor, known for his role as Ethan Rom on the television series Lost and starring in the film In the Bedroom. He is also known for the film Another Earth.

Personal life

Mapother was born in Louisville, Kentucky, the son of Louisa (née Riehm) and William Reibert Mapother Sr (c.1938-2006).[2]. He is a first cousin of actor Tom Cruise (whose birth name was Thomas Cruise Mapother IV). His father was an attorney, bankruptcy consultant and judge in Louisville, between 1967 and 1970; William Sr., died on June 22, 2006, after fighting lung cancer and pulmonary fibrosis.[1]


Mapother has become widely known as a character actor, who sometimes plays scary or otherwise dark characters. He played a pivotal role in Todd Field's In the Bedroom, and is perhaps best known as Ethan Rom in the TV show Lost, which he played for 11 episodes during the life of the series.

Mapother has also had considerable roles in a series of independent films, such as The Lather Effect, Moola, Hurt, and Another Earth. Mapother starred in The Burrowers as a former Native American fighter who joins a posse to help find missing white settlers, only to discover that the hunters have become the hunted.

In September 2007, he was elected to a three-year term on the National Board of Directors for the Screen Actors Guild.

He has provided the motion capture work for Agent 47, the main character in the 2012 video game Hitman: Absolution and also provided the voice before series veteran David Bateson was recast. In 2014, he played the lead in the paranormal horror film The Atticus Institute.[3]

He is a founding partner of the film finance platform Slated.


Year Title Role Notes
1989 Born on the Fourth of July Platoon Member - Vietnam
1998 Without Limits Bob Peters
1998 Trickle Josh Riddell
1998 The Unknown Cyclist By-Stander
1999 Magnolia WDKK Show Director's Assistant
2000 Mission: Impossible 2 Wallis
2000 Almost Famous Bartender scenes deleted
2001 In the Bedroom Richard Strout
2001 Swordfish Gabriel's Crew
2002 Minority Report Hotel Clerk
2002 Self Storage Graham
2003 The Kiss Peter
2004 Suspect Zero Bill Grieves
2004 The Grudge Matthew Williams
2005 Lords of Dogtown Donnie
2005 The Zodiac Dale Coverling
2005 Chloe Doctor
2006 Ask The Dust Bill
2006 The Lather Effect Jack
2006 World Trade Center Jason Thomas
2007 Moola Bob
2007 Moving McAllister Bob
2008 The Burrowers Will Parcher
2008 Hurt Darryl Coltrane
2010 A Warrior's Heart David Milligan
2011 Another Earth John Burroughs
2011 Warrior David Milligan
2011 Citizen Gangster Detective Rhys
2012 FDR: American Badass! Dr. Ellington
2013 Underdogs Bill Burkett
2014 I Origins Darryl
2015 The Atticus Institute Dr. Henry West
2015 Blackhat Rich Donahue
2016 Tell Me How I Die Dr. Jerrems


Year Title Role Notes
2002 CSI: Crime Scene Investigation Douglas Sampson 1 episode
2002 The Pennsylvania Miners' Story John 'Flathead' Phillippi
2002 Touched by an Angel Eddie 2 episodes
2003 Law & Order: Special Victims Unit Luke Edmunds 1 episode
2004 Line of Fire Larry 2 episodes
2004 CSI: Miami Pete Keller 1 episode
2004 NCIS Kyle Grayson 1 episode
2004-2010 Lost Ethan Rom 11 episodes
2005 The Inside Ronald Ewing 1 episode
2005 Threshold Gunneson 2 episodes
2004 Crossing Jordan Henry Bishop 1 episode
2006 Robot Chicken Alien Bully / Leprechaun #2 2 episodes
2007 K-Ville Gordon Wix 1 episode
2007 Viva Laughlin Sweet Lenny Collins 1 episode
2007 WordGirl Guy Rich (voice) 1 episode
2008 Skip Tracer Henry Hargrove Jr.
2008 Lost: Missing Pieces Ethan Rom 1 episode
2008 Criminal Minds Ian Corbin 1 episode
2009 Prison Break FBI Agent Chris Franco 2 episodes
2010 I Heart Vampires William 2 episodes
2011-2014 The Mentalist Richard Haibach 4 episodes
2012 Burn Notice Garret Hartley 1 episodes
2012 Justified Delroy Baker 2 episodes
2012 American Horror Story Misogynist Driver 1 episode
2013 Mad Men Randall Walsh 1 episode
2013 Castle Carl Matthews 1 episode
2014 Hawaii Five-0 Eric Porter 1 episode
2015 Constantine Jacob Shaw 1 episode
2015 Grimm Dwight Eleazar "The Believer"
2016 Supergirl Rudy Jones / The Parasite 1 episode
2017 MacGyver Daniel Horn 1 Episode "Hole Puncher"
2018 The Blacklist Bill 1 Episode "Ruin"

Video games

Year Title Role Notes
2010 Fallout: New Vegas Colonel James Hsu
2016 Hitman Dino Bosco

See also


External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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