William Mapother

Biography

William Reibert Mapother Jr. (/ˈmeɪpɒθər/; 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. Description above from the Wikipedia article William Mapother, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Known For

Law & Order: Special Victims Unit

NCIS

The Blacklist

The Mentalist

Criminal Minds

CSI: Crime Scene Investigation

Hawaii Five-0

Lost

All Movies (45)

• The Leader2026 · as Reverend Applewhite
• Outlaw Posse2024 · as Angel
• Black Girl Missing2023 · as Russell
• On Sacred Ground2023 · as Daniel McKinney
• Son of Monarchs2021 · as Bob
• Tell Me How I Die2016 · as Dr. Jerrems
• Blackhat2015 · as Rich Donahue
• The Atticus Institute2015 · as Dr. Henry West
• American War Generals2014 · as Self - Narrator
• I Origins2014 · as Darryl Mackenzie
• Drew Peterson: Untouchable2014 · as Glenn Levecke
• Escape from Polygamy2013 · as Ervil
• Underdogs2013 · as Bill Burkett
• Jobs2013 · as Calligraphy Professor
• It's Dark Here2013 · as David Tennies
• Static2012 · as Greg Wagner
• FDR: American Badass!2012 · as Dr. Ellington
• Darnell Dawkins: Mouth Guitar Legend2012 · as Pastor Jenkins
• A Warrior's Heart2011 · as Coach David Milligan
• Edwin Boyd: Citizen Gangster2011 · as Detective Rhys
• Another Earth2011 · as John Burroughs
• Portraits in Dramatic Time2011
• Hurt2009 · as Darryl Coltrane
• The Burrowers2008 · as Will Parcher
• Moving McAllister2007 · as Bob
• Moola2007 · as Steve
• World Trade Center2006 · as Marine Sergeant Thomas
• The Lather Effect2006 · as Jack
• Ask the Dust2006 · as Bill
• The Zodiac2005 · as Dale Coverling
• Lords of Dogtown2005 · as Donnie
• The Grudge2004 · as Matthew Williams
• Suspect Zero2004 · as Bill Grieves
• The Kiss2003 · as Peter
• Minority Report2002 · as Hotel Clerk
• The Pennsylvania Miners' Story2002 · as John 'Flathead' Phillippi
• Vanilla Sky2001 · as Clubgoer (uncredited)
• In the Bedroom2001 · as Richard Strout
• Swordfish2001 · as Gabriel's Crew
• Mission: Impossible II2000 · as Wallis
• Magnolia1999 · as WDKK Show Director's Assistant
• The Unknown Cyclist1998 · as By Stander
• Without Limits1998 · as Bob Peters
• Born on the Fourth of July1989 · as Platoon - Vietnam
• The Possession at Gladstone Manor— · as Henry Gladstone

All TV Shows (34)

• Suits LA2025 · as Greg Fisher
• A Little Dream2021 · as Wayne
• 9-1-1: Lone Star2020 · as Bruce Ackerman
• FBI: Most Wanted2020 · as Travis Russell
• MacGyver2016 · as The Client / Daniel Holt
• Rush Hour2016 · as Principal
• Supergirl2015 · as Dr. Rudy Jones / Parasite
• Minority Report2015 · as Charlie Peele
• Powers2015 · as Todd Secor
• Constantine2014 · as Jacob Shaw
• The Blacklist2013 · as Bill
• Grimm2011 · as Dwight Eleazer
• American Horror Story2011 · as Driver
• Hawaii Five-02010 · as Eric Porter
• Justified2010 · as Delroy Baker
• Human Target2010 · as Sam Fisher
• Celebrity Ghost Stories2009 · as Self
• Castle2009 · as Carl Matthews
• The Mentalist2008 · as Richard Haibach
• Viva Laughlin2007
• K-Ville2007
• Mad Men2007 · as Randall Walsh
• Burn Notice2007 · as Garret Hartley
• Criminal Minds2005 · as Ian Corbin
• Threshold2005
• The Inside2005 · as Ronald Ewing
• Lost2004 · as Ethan Rom
• NCIS2003 · as Kyle Grayson
• CSI: Miami2002 · as Pete Keller
• Law & Order: Criminal Intent2001 · as John Silvestri
• Crossing Jordan2001 · as Henry Bishop
• CSI: Crime Scene Investigation2000 · as Douglas Sampson
• Law & Order: Special Victims Unit1999 · as Luke Edmunds
• Touched by an Angel1994 · as Eddie