William Mapother

William Mapother

Acting

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.

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Filmography

79
The Leader The Leader 2026 Suits LA ★ 6.9 Suits LA 2025 Outlaw Posse ★ 4.7 Outlaw Posse 2024 Black Girl Missing ★ 7.3 Black Girl Missing 2023 On Sacred Ground ★ 5.3 On Sacred Ground 2023 Son of Monarchs ★ 5.5 Son of Monarchs 2021 A Little Dream A Little Dream 2021 9-1-1: Lone Star ★ 8.0 9-1-1: Lone Star 2020 FBI: Most Wanted ★ 7.6 FBI: Most Wanted 2020 MacGyver ★ 7.3 MacGyver 2016 Tell Me How I Die ★ 5.4 Tell Me How I Die 2016 Rush Hour ★ 5.2 Rush Hour 2016 Supergirl ★ 7.3 Supergirl 2015 Minority Report ★ 5.9 Minority Report 2015 Powers ★ 6.6 Powers 2015 Blackhat ★ 5.5 Blackhat 2015 The Atticus Institute ★ 5.8 The Atticus Institute 2015 Constantine ★ 7.8 Constantine 2014 American War Generals American War Generals 2014 I Origins ★ 7.6 I Origins 2014 Drew Peterson: Untouchable ★ 5.3 Drew Peterson: Untouchable 2014 The Blacklist ★ 7.6 The Blacklist 2013 Escape from Polygamy ★ 6.8 Escape from Polygamy 2013 Underdogs ★ 5.7 Underdogs 2013 Jobs ★ 6.1 Jobs 2013 It's Dark Here It's Dark Here 2013 Static ★ 5.2 Static 2012 FDR: American Badass! ★ 5.1 FDR: American Badass! 2012 Darnell Dawkins: Mouth Guitar Legend Darnell Dawkins: Mouth Guitar Legend 2012 A Warrior's Heart ★ 5.4 A Warrior's Heart 2011 Grimm ★ 8.3 Grimm 2011 American Horror Story ★ 8.1 American Horror Story 2011 Edwin Boyd: Citizen Gangster ★ 5.6 Edwin Boyd: Citizen Gangster 2011 Another Earth ★ 6.7 Another Earth 2011 Portraits in Dramatic Time ★ 8.0 Portraits in Dramatic Time 2011 Hawaii Five-0 ★ 7.7 Hawaii Five-0 2010 Justified ★ 8.0 Justified 2010 Human Target ★ 7.2 Human Target 2010 Hurt ★ 4.6 Hurt 2009 Celebrity Ghost Stories ★ 7.3 Celebrity Ghost Stories 2009 Castle ★ 8.0 Castle 2009 The Mentalist ★ 8.4 The Mentalist 2008 The Burrowers ★ 5.9 The Burrowers 2008 Viva Laughlin ★ 2.5 Viva Laughlin 2007 K-Ville ★ 6.7 K-Ville 2007 Moving McAllister ★ 5.1 Moving McAllister 2007 Mad Men ★ 8.1 Mad Men 2007 Burn Notice ★ 7.5 Burn Notice 2007 Moola ★ 4.1 Moola 2007 World Trade Center ★ 6.1 World Trade Center 2006 The Lather Effect ★ 5.0 The Lather Effect 2006 Ask the Dust ★ 5.4 Ask the Dust 2006 Criminal Minds ★ 8.3 Criminal Minds 2005 Threshold ★ 7.0 Threshold 2005 The Zodiac ★ 5.5 The Zodiac 2005 The Inside ★ 7.3 The Inside 2005 Lords of Dogtown ★ 7.1 Lords of Dogtown 2005 The Grudge ★ 5.9 The Grudge 2004 Lost ★ 8.0 Lost 2004 Suspect Zero ★ 5.6 Suspect Zero 2004 NCIS ★ 7.6 NCIS 2003 The Kiss ★ 5.3 The Kiss 2003 CSI: Miami ★ 7.7 CSI: Miami 2002 Minority Report ★ 7.4 Minority Report 2002 The Pennsylvania Miners' Story ★ 7.0 The Pennsylvania Miners' Story 2002 Vanilla Sky ★ 6.8 Vanilla Sky 2001 In the Bedroom ★ 6.9 In the Bedroom 2001 Law & Order: Criminal Intent ★ 7.6 Law & Order: Criminal Intent 2001 Crossing Jordan ★ 7.2 Crossing Jordan 2001 Swordfish ★ 6.3 Swordfish 2001 CSI: Crime Scene Investigation ★ 7.6 CSI: Crime Scene Investigation 2000 Mission: Impossible II ★ 6.1 Mission: Impossible II 2000 Magnolia ★ 7.7 Magnolia 1999 Law & Order: Special Victims Unit ★ 7.9 Law & Order: Special Victims Unit 1999 The Unknown Cyclist ★ 4.7 The Unknown Cyclist 1998 Without Limits ★ 6.6 Without Limits 1998 Touched by an Angel ★ 7.2 Touched by an Angel 1994 Born on the Fourth of July ★ 7.0 Born on the Fourth of July 1989 The Possession at Gladstone Manor The Possession at Gladstone Manor