William Mapother

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.

Early life and education

Mapother was born in Louisville, Kentucky, the son of Louisa and William Reibert Mapother Sr. His father was an attorney and served as a judge in Louisville between 1967 and 1970. Mapother Jr. is a first cousin of actor Tom Cruise, whose birth name is Thomas Cruise Mapother IV.

Career 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.

Awards William Mapother received a nomination for a Gotham Award for the film In the Bedroom in 2001, but a search for a specific ACCA nomination in 2001 or an Actor Award for Outstanding Performance by the Cast of a Theatrical Motion Picture in 2002 for him did not yield results, though he did not win the Gotham Award.

Filmography Film Year Title Role Notes 1989 Born on the Fourth of July Platoon Member – Vietnam 1998 Without Limits Bob Peters Trickle Josh Riddell The Unknown Cyclist By-Stander 1999 Magnolia WDKK Show Director's Assistant 2000 Mission: Impossible 2 Wallis Almost Famous Bartender Scenes deleted 2001 In the Bedroom Richard Strout Swordfish Gabriel's Crew 2002 Minority Report Hotel Clerk Self Storage Graham 2003 The Kiss Peter 2004 Suspect Zero Bill Grieves The Grudge Matthew Williams 2005 Lords of Dogtown Donnie The Zodiac Dale Coverling Chloe Doctor 2006 Ask The Dust Bill The Lather Effect Jack World Trade Center Jason Thomas 2007 Moola Bob Moving McAllister Bob 2008 The Burrowers Will Parcher Hurt Darryl Coltrane 2010 A Warrior's Heart David Milligan 2011 Another Earth John Burroughs Citizen Gangster Detective Rhys 2012 FDR: American Badass! Dr. Ellington 2013 Underdogs Bill Burkett 2014 I Origins Darryl 2015 The Atticus Institute Dr. Henry West Blackhat Rich Donahue 2016 Tell Me How I Die Dr. Jerrems 2024 Outlaw Posse Angel 2026 The Leader Reverend Applewhite

Television Year Title Role Notes 2002 CSI: Crime Scene Investigation Douglas Sampson Episode: "Snuff" The Pennsylvania Miners' Story John 'Flathead' Phillippi TV movie Touched by an Angel Eddie 2 episodes 2003 Law & Order: Special Victims Unit Luke Edmunds Episode: "Rotten" 2004 Line of Fire Larry 2 episodes CSI: Miami Pete Keller Episode: 'Lost Son" NCIS Kyle Grayson Episode: "See No Evil" Crossing Jordan Henry Bishop Episode: "Death Goes On" 2004–2010 Lost Ethan Rom 11 episodes 2005 The Inside Ronald Ewing Episode: "Skin and Bone" Threshold Gunneson 2 episodes 2006 Robot Chicken Alien Bully / Leprechaun #2 2 episodes 2007 K-Ville Gordon Wix Episode: "Pilot" Viva Laughlin Sweet Lenny Collins Episode: "What a Whale Wants" WordGirl Guy Rich (voice) Episode: "The Young and the Meatless/Mr. Big's Colossal Mini-Golf" 2008 Skip Tracer Henry Hargrove Jr. TV movie Lost: Missing Pieces Ethan Rom Episode: "Jack, Meet Ethan. Ethan? Jack." Criminal Minds Ian Corbin Episode: "Paradise" 2009 Prison Break FBI Agent Chris Franco 2 episodes 2010 Human Target Sam Fisher Episode "Sanctuary" I Heart Vampires William 2 episodes Law & Order: Criminal Intent John Silvestri Episode: "Love on Ice" 2011–2014 The Mentalist Richard Haibach 4 episodes 2012 Burn Notice Garret Hartley Episode: "Shock Wave" Justified Delroy Baker 2 episodes American Horror Story Misogynist Driver Episode: "Dark Cousin" 2013 Mad Men Randall Walsh Episode: "The Flood" Castle Carl Matthews Episode: "The Disciple" 2014 Hawaii Five-0 Eric Porter Episode: "Ka Makuakaneka" 2015 Constantine Jacob Shaw Episode: "A Whole World Out There" Grimm Dwight Eleazar Episode: "The Believer" 2016 Supergirl Rudy Jones / The Parasite Episode: "Changing" 2017 MacGyver Daniel Horn Episode: "Hole Puncher" 2018 The Blacklist Bill Episode: "Ruin" 2020 9-1-1: Lone Star Bruce Ackerman Episode: "Monster Inside" 2021 FBI Most Wanted Travis Russel Episode: "Winner"

Video games Year Title Role Notes 2010 Fallout: New Vegas Colonel James Hsu 2012 Hitman: Absolution Agent 47 Motion capture 2016 Hitman Dino Bosco