William Mapother

12 hours ago
Albert Flores

William Reibert Mapother Jr. (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.


Personal life

Mapother was born in Louisville, Kentucky, the son of Louisa (née Riehm) and William Reibert Mapother Sr (c. 1938-2006). +more His father was an attorney, bankruptcy consultant, and judge in Louisville between 1967 and 1970. William Sr. died on June 22, 2006 as a result of lung cancer and pulmonary fibrosis. Mapother Jr. is a first cousin of actor Tom Cruise, whose birth name is Thomas Cruise Mapother IV.


Mapother has become widely known as a character actor, and sometimes plays scary or otherwise dark characters. He played a pivotal role in Todd Field's In the Bedroom, and is perhaps best known as Ethan Rom in the TV show Lost, which he played for 11 episodes during the life of the series.

Mapother has also had considerable roles in a series of independent films, such as The Lather Effect, Moola, Hurt, and Another Earth. Mapother starred in The Burrowers as a Native American fighter who joins a posse to help find missing white settlers.

In September 2007, he was elected to a three-year term on the National Board of Directors for the Screen Actors Guild.

He has provided the motion capture work for Agent 47, the main character in the 2012 video game Hitman: Absolution and also provided the voice before series veteran David Bateson was recast. In 2014, he played the lead in the paranormal horror film The Atticus Institute.


1989Born on the Fourth of JulyPlatoon Member - Vietnam
1998Without LimitsBob Peters
1998TrickleJosh Riddell
1998The Unknown CyclistBy-Stander
1999MagnoliaWDKK Show Director's Assistant
2000Mission: Impossible 2Wallis
2000Almost FamousBartenderscenes deleted
2001In the BedroomRichard Strout
2001SwordfishGabriel's Crew
2002Minority ReportHotel Clerk
2002Self StorageGraham
2003The KissPeter
2004Suspect ZeroBill Grieves
2004The GrudgeMatthew Williams
2005Lords of DogtownDonnie
2005The ZodiacDale Coverling
2006Ask The DustBill
2006The Lather EffectJack
2006World Trade CenterJason Thomas
2007Moving McAllisterBob
2008The BurrowersWill Parcher
2008HurtDarryl Coltrane
2010A Warrior's HeartDavid Milligan
2011Another EarthJohn Burroughs
2011WarriorDavid Milligan
2011Citizen GangsterDetective Rhys
2012FDR: American Badass!Dr. Ellington
2013UnderdogsBill Burkett
2014I OriginsDarryl
2015The Atticus InstituteDr. +more Henry West
2015BlackhatRich Donahue
2016Tell Me How I DieDr. Jerrems


2002CSI: Crime Scene InvestigationDouglas Sampson1 episode
2002The Pennsylvania Miners' StoryJohn 'Flathead' Phillippi
2002Touched by an AngelEddie2 episodes
2003Law & Order: Special Victims UnitLuke Edmunds1 episode
2004Line of FireLarry2 episodes
2004CSI: MiamiPete Keller1 episode
2004NCISKyle Grayson1 episode
2004-2010LostEthan Rom11 episodes
2005The InsideRonald Ewing1 episode
2005ThresholdGunneson2 episodes
2004Crossing JordanHenry Bishop1 episode
2006Robot ChickenAlien Bully / Leprechaun #22 episodes
2007K-VilleGordon Wix1 episode
2007Viva LaughlinSweet Lenny Collins1 episode
2007WordGirlGuy Rich (voice)1 episode
2008Skip TracerHenry Hargrove Jr.
2008Lost: Missing PiecesEthan Rom1 episode
2008Criminal MindsIan Corbin1 episode
2009Prison BreakFBI Agent Chris Franco2 episodes
2010Human Target (2010 TV series)Sam FisherEpisode "Sanctuary"
2010I Heart VampiresWilliam2 episodes
2011-2014The MentalistRichard Haibach4 episodes
2012Burn NoticeGarret Hartley1 episodes
2012JustifiedDelroy Baker2 episodes
2012American Horror StoryMisogynist Driver1 episode
2013Mad MenRandall Walsh1 episode
2013CastleCarl Matthews1 episode
2014Hawaii Five-0Eric Porter1 episode
2015ConstantineJacob Shaw1 episode
2015GrimmDwight Eleazar"The Believer"
2016SupergirlRudy Jones / The Parasite1 episode
2017MacGyverDaniel Horn1 Episode "Hole Puncher"
2018The BlacklistBill1 Episode "Ruin"
20209-1-1: Lone StarBruce Ackerman1 Episode "Monster Inside"
2021FBI Most WantedTravis Russel1 Episode “Winner”

Video games

2010Fallout: New VegasColonel James Hsu
2016HitmanDino Bosco

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