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. Description above from the Wikipedia article William Mapother, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Filmography

• 2026SHED — Dr. Levin
• 2026The Leader — Reverend Applewhite
• Suits LA — Greg Fisher
• 2024Outlaw Posse — Angel
• 2023Black Girl Missing — Russell
• 2023On Sacred Ground — Daniel McKinney, Writer
• A Little Dream — Wayne
• 2021Son of Monarchs — Bob, Co-Executive Producer
• 9-1-1: Lone Star — Bruce Ackerman
• FBI: Most Wanted — Travis Russell
• MacGyver — The Client / Daniel Holt
• Rush Hour — Principal
• 2016Tell Me How I Die — Dr. Jerrems
• 2015Blackhat — Rich Donahue
• Minority Report — Charlie Peele
• Powers — Todd Secor
• Supergirl — Dr. Rudy Jones / Parasite
• 2015The Atticus Institute — Dr. Henry West
• Constantine — Jacob Shaw
• 2014Drew Peterson: Untouchable — Glenn Levecke
• 2014I Origins — Darryl Mackenzie
• 2013Escape from Polygamy — Ervil
• 2013It's Dark Here — David Tennies
• 2013Jobs — Calligraphy Professor
• The Blacklist — Bill
• 2013Underdogs — Bill Burkett
• 2012Darnell Dawkins: Mouth Guitar Legend — Pastor Jenkins
• 2012FDR: American Badass! — Dr. Ellington
• 2012Static — Greg Wagner
• 2011A Warrior's Heart — Coach David Milligan
• American Horror Story — Driver
• 2011Another Earth — John Burroughs
• 2011Edwin Boyd: Citizen Gangster — Detective Rhys
• Grimm — Dwight Eleazer
• 2011Portraits in Dramatic Time
• Hawaii Five-0 — Eric Porter
• Human Target — Sam Fisher
• Justified — Delroy Baker
• Castle — Carl Matthews
• 2009Hurt — Darryl Coltrane
• 2008The Burrowers — Will Parcher
• The Mentalist — Richard Haibach
• Burn Notice — Garret Hartley
• K-Ville
• Mad Men — Randall Walsh
• 2007Moola — Steve
• 2007Moving McAllister — Bob
• Viva Laughlin
• 2006Ask the Dust — Bill
• 2006The Lather Effect — Jack
• 2006World Trade Center — Marine Sergeant Thomas
• Criminal Minds — Ian Corbin
• 2005Lords of Dogtown — Donnie
• The Inside — Ronald Ewing
• 2005The Zodiac — Dale Coverling
• Threshold
• Lost — Ethan Rom
• 2004Suspect Zero — Bill Grieves
• 2004The Grudge — Matthew Williams
• NCIS — Kyle Grayson
• 2003The Kiss — Peter
• CSI: Miami — Pete Keller
• 2002Minority Report — Hotel Clerk
• 2002The Pennsylvania Miners' Story — John 'Flathead' Phillippi
• Crossing Jordan — Henry Bishop
• 2001In the Bedroom — Richard Strout
• Law & Order: Criminal Intent — John Silvestri
• 2001Swordfish — Gabriel's Crew
• 2001Vanilla Sky — Clubgoer (uncredited)
• CSI: Crime Scene Investigation — Douglas Sampson
• 2000Mission: Impossible II — Wallis
• Law & Order: Special Victims Unit — Luke Edmunds
• 1999Magnolia — WDKK Show Director's Assistant
• 1998The Unknown Cyclist — By Stander
• 1998Without Limits — Bob Peters
• Touched by an Angel — Eddie
• 1989Born on the Fourth of July — Platoon - Vietnam
• The Possession at Gladstone Manor — Henry Gladstone

Appearances as themselves (2)

• 2014American War Generals — Self - Narrator
• Celebrity Ghost Stories — Self