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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Known For
Magnolia
(1999)
WDKK Show Director's Assistant
Blackhat
(2015)
Rich Donahue
The Grudge
(2004)
Matthew Williams
Mission: Impossible II
(2000)
Wallis
I Origins
(2014)
Darryl Mackenzie
Minority Report
(2002)
Hotel Clerk
Vanilla Sky
(2001)
Clubgoer (uncredited)
Another Earth
(2011)
John Burroughs
Swordfish
(2001)
Gabriel's Crew
Born on the Fourth of July
(1989)
Platoon - Vietnam
Jobs
(2013)
Calligraphy Professor
World Trade Center
(2006)
Marine Sergeant Thomas
Suspect Zero
(2004)
Bill Grieves
Lords of Dogtown
(2005)
Donnie
In the Bedroom
(2001)
Richard Strout
Without Limits
(1998)
Bob Peters
Full Filmography
Acting
Born on the Fourth of July
(1989)
Platoon - Vietnam
Without Limits
(1998)
Bob Peters
The Unknown Cyclist
(1998)
By Stander
Magnolia
(1999)
WDKK Show Director's Assistant
Mission: Impossible II
(2000)
Wallis
In the Bedroom
(2001)
Richard Strout
Swordfish
(2001)
Gabriel's Crew
Vanilla Sky
(2001)
Clubgoer (uncredited)
Minority Report
(2002)
Hotel Clerk
The Kiss
(2003)
Peter
The Grudge
(2004)
Matthew Williams
Suspect Zero
(2004)
Bill Grieves
The Zodiac
(2005)
Dale Coverling
Lords of Dogtown
(2005)
Donnie
Ask the Dust
(2006)
Bill
The Lather Effect
(2006)
Jack
World Trade Center
(2006)
Marine Sergeant Thomas
Moola
(2007)
Steve
Moving McAllister
(2007)
Bob
The Burrowers
(2008)
Will Parcher
Lost: Missing Pieces: Jack, Meet Ethan. Ethan? Jack.
(2008)
Ethan Rom
Hurt
(2009)
Darryl Coltrane
Another Earth
(2011)
John Burroughs
Edwin Boyd: Citizen Gangster
(2011)
Detective Rhys
A Warrior's Heart
(2011)
Coach David Milligan
Portraits in Dramatic Time
(2011)
Static
(2012)
Greg Wagner
Darnell Dawkins: Mouth Guitar Legend
(2012)
Pastor Jenkins
FDR: American Badass!
(2012)
Dr. Ellington
Underdogs
(2013)
Bill Burkett
Escape from Polygamy
(2013)
Ervil
It's Dark Here
(2013)
David Tennies
Jobs
(2013)
Calligraphy Professor
Drew Peterson: Untouchable
(2014)
Glenn Levecke
I Origins
(2014)
Darryl Mackenzie
Blackhat
(2015)
Rich Donahue
The Atticus Institute
(2015)
Dr. Henry West
Tell Me How I Die
(2016)
Dr. Jerrems
Son of Monarchs
(2021)
Bob
On Sacred Ground
(2023)
Daniel McKinney
Outlaw Posse
(2024)
Angel
Production
Writing