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