William Mapother
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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Acted in
Outlaw Posse
2024
as Angel
Black Girl Missing
2023
as Russell
On Sacred Ground
2023
as Daniel McKinney
Son of Monarchs
2021
as Bob
A Little Dream
2021
as Wayne
9-1-1: Lone Star
2020
as Bruce Ackerman
FBI: Most Wanted
2020
as Travis Russell
MacGyver
2016
as The Client / Daniel Holt
Tell Me How I Die
2016
as Dr. Jerrems
Rush Hour
2016
as Principal
Supergirl
2015
as Dr. Rudy Jones / Parasite
Minority Report
2015
as Charlie Peele
Powers
2015
as Todd Secor
Blackhat
2015
as Rich Donahue
The Atticus Institute
2015
as Dr. Henry West
Constantine
2014
as Jacob Shaw
I Origins
2014
as Darryl Mackenzie
Drew Peterson: Untouchable
2014
as Glenn Levecke
The Blacklist
2013
as Bill
Escape from Polygamy
2013
as Ervil
Underdogs
2013
as Bill Burkett
Jobs
2013
as Calligraphy Professor
It's Dark Here
2013
as David Tennies
Static
2012
as Greg Wagner
FDR: American Badass!
2012
as Dr. Ellington
Darnell Dawkins: Mouth Guitar Legend
2012
as Pastor Jenkins
A Warrior's Heart
2011
as Coach David Milligan
Grimm
2011
as Dwight Eleazer
American Horror Story
2011
as Driver
Edwin Boyd: Citizen Gangster
2011
as Detective Rhys
Another Earth
2011
as John Burroughs
Portraits in Dramatic Time
2011
Hawaii Five-0
2010
as Eric Porter
Justified
2010
as Delroy Baker
Human Target
2010
Hurt
2009
as Darryl Coltrane
Castle
2009
as Carl Matthews
The Mentalist
2008
as Richard Haibach
The Burrowers
2008
as Will Parcher
Viva Laughlin
2007
K-Ville
2007
Moving McAllister
2007
as Bob
Mad Men
2007
as Randall Walsh
Burn Notice
2007
as Garret Hartley
Moola
2007
as Steve
World Trade Center
2006
as Marine Sergeant Thomas
The Lather Effect
2006
as Jack
Ask the Dust
2006
as Bill
Criminal Minds
2005
as Ian Corbin
Threshold
2005
The Zodiac
2005
as Dale Coverling
The Inside
2005
as Ronald Ewing
Lords of Dogtown
2005
as Donnie
The Grudge
2004
as Matthew Williams
Lost
2004
as Ethan Rom
Suspect Zero
2004
as Bill Grieves
NCIS
2003
as Kyle Grayson
The Kiss
2003
as Peter
CSI: Miami
2002
as Pete Keller
Minority Report
2002
as Hotel Clerk
Vanilla Sky
2001
as Clubgoer (uncredited)
In the Bedroom
2001
as Richard Strout
Law & Order: Criminal Intent
2001
as John Silvestri
Crossing Jordan
2001
as Henry Bishop
Swordfish
2001
as Gabriel's Crew
CSI: Crime Scene Investigation
2000
as Douglas Sampson
Mission: Impossible II
2000
as Wallis
Magnolia
1999
as WDKK Show Director's Assistant
Law & Order: Special Victims Unit
1999
as Luke Edmunds
The Unknown Cyclist
1998
as By Stander
Without Limits
1998
as Bob Peters
Touched by an Angel
1994
as Eddie
Born on the Fourth of July
1989
as Platoon - Vietnam
The Possession at Gladstone Manor
as Henry Gladstone