William Mapother
Acting1965Louisville, Kentucky, USA
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.
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Known For
Acting History
2025
Suits LA
TVas Greg Fisher• 1 eps
2024
Outlaw Posse
as Angel
2023
2021
FBI: Most Wanted
TVas Travis Russell• 1 eps
2020
9-1-1: Lone Star
TVas Bruce Ackerman• 1 eps
2018
The Blacklist
TVas Bill• 1 eps
2017
MacGyver
TVas The Client / Daniel Holt• 2 eps
2016
Tell Me How I Die
as Dr. Jerrems
Grimm
TVas Dwight Eleazer• 1 eps
Supergirl
TVas Dr. Rudy Jones / Parasite• 1 eps
Rush Hour
TVas Principal• 1 eps
2015
The Atticus Institute
as Dr. Henry West
Blackhat
as Rich Donahue
Powers
TVas Todd Secor
Minority Report
TVas Charlie Peele• 2 eps
Constantine
TVas Jacob Shaw• 1 eps
2014
Drew Peterson: Untouchable
as Glenn Levecke
I Origins
as Darryl Mackenzie
Hawaii Five-0
TVas Eric Porter• 1 eps
2013
Jobs
as Calligraphy Professor
Escape from Polygamy
as Ervil
Underdogs
as Bill Burkett
It's Dark Here
as David Tennies
Mad Men
TVas Randall Walsh• 1 eps
Castle
TVas Carl Matthews• 1 eps
2012
Static
as Greg Wagner
FDR: American Badass!
as Dr. Ellington
Darnell Dawkins: Mouth Guitar Legend
as Pastor Jenkins
American Horror Story
TVas Driver• 1 eps
Celebrity Ghost Stories
TVas Self• 1 eps
Justified
TVas Delroy Baker• 2 eps
Burn Notice
TVas Garret Hartley• 1 eps
2011
Another Earth
as John Burroughs
Citizen Gangster
as Detective Rhys
A Warrior's Heart
as Coach David Milligan
The Mentalist
TVas Richard Haibach• 4 eps
2010
Human Target
TVas Sam Fisher• 1 eps
Law & Order: Criminal Intent
TVas John Silvestri• 1 eps
2009
Hurt
as Darryl Coltrane
2008
The Burrowers
as Will Parcher
Criminal Minds
TVas Ian Corbin• 1 eps
2007
2006
2005
The Zodiac
as Dale Coverling
Lords of Dogtown
as Donnie
The Inside
TVas Ronald Ewing
Crossing Jordan
TVas Henry Bishop• 1 eps
2004
Suspect Zero
as Bill Grieves
The Grudge
as Matthew Williams
CSI: Miami
TVas Pete Keller• 1 eps
NCIS
TVas Kyle Grayson• 1 eps
Lost
TVas Ethan Rom• 11 eps
2003
The Kiss
as Peter
Touched by an Angel
TVas Eddie• 2 eps
Law & Order: Special Victims Unit
TVas Luke Edmunds• 1 eps
2002
The Pennsylvania Miners' Story
as John 'Flathead' Phillippi
Minority Report
as Hotel Clerk
CSI: Crime Scene Investigation
TVas Douglas Sampson• 1 eps
2001
2000
Mission: Impossible II
as Wallis
1999
Magnolia
as WDKK Show Director's Assistant
1998
Without Limits
as Bob Peters
The Unknown Cyclist
as By Stander
1989
Born on the Fourth of July
as Platoon - Vietnam