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William Reibert Mapother Jr. 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.
Actor Filmography
| Title | Character | Year |
|---|
| Outlaw Posse | Angel | 2024 |
| Black Girl Missing | Russell | 2023 |
| Son of Monarchs | Bob | 2021 |
| Save Me | Sonny Moore | 2020 |
| Lethal Weapon | Jacob Porter | 2016 |
| Tell Me How I Die | Dr. Jerrems | 2016 |
| Rush Hour | Principal Calhoun | 2016 |
| Supergirl | Dr. Rudy Jones / Parasite | 2015 |
| Powers | Todd Secor | 2015 |
| Blackhat | Rich Donahue | 2015 |
Actor Filmography
| Title | Character | Year |
|---|
| Outlaw Posse | Angel | 2024 |
| Black Girl Missing | Russell | 2023 |
| Son of Monarchs | Bob | 2021 |
| Save Me | Sonny Moore | 2020 |
| Lethal Weapon | Jacob Porter | 2016 |
| Tell Me How I Die | Dr. Jerrems | 2016 |
| Rush Hour | Principal Calhoun | 2016 |
| Supergirl | Dr. Rudy Jones / Parasite | 2015 |
| Powers | Todd Secor | 2015 |
| Blackhat | Rich Donahue | 2015 |
| The Atticus Institute | Dr. Henry West | 2014 |
| Constantine | Jacob Shaw | 2014 |
| The Lottery | Tyler Waters | 2014 |
| I Origins | Darryl Mackenzie | 2014 |
| Escape from Polygamy | Ervil | 2013 |
| Underdogs | Bill Burkett | 2013 |
| Jobs | Calligraphy Professor | 2013 |
| It's Dark Here | David Tennies | 2013 |
| Static | Greg Wagner | 2012 |
| FDR: American Badass! | Dr. Ellington | 2012 |
| Darnell Dawkins: Mouth Guitar Legend | Pastor Jenkins | 2012 |
| Drew Peterson: Untouchable | Glenn Levecke | 2012 |
| A Warrior's Heart | Coach David Milligan | 2011 |
| Grimm | Dwight Eleazer | 2011 |
| Citizen Gangster | Detective David Rhys / Detective Rhys | 2011 |
| Another Earth | John Burroughs | 2011 |
| Justified | Delroy Baker | 2010 |
| Hurt | Darryl Coltrane | 2009 |
| The Burrowers | William Parcher / Will Parcher | 2008 |
| Lost: Missing Pieces | Ethan Rom | 2007 |
| K-Ville | Gordon Wix | 2007 |
| Moving McAllister | Bob | 2007 |
| WordGirl | Guy Rich | 2007 |
| Moola | Steve | 2007 |
| Mountaintop Removal | Narrator | 2007 |
| World Trade Center | Marine Sergeant Thomas | 2006 |
| The Lather Effect | Jack | 2006 |
| Ask the Dust | Bill | 2006 |
| Made in Hollywood | Self | 2005 |
| Prison Break | FBI Agent Chris Franco | 2005 |
| The Zodiac | Dale Coverling | 2005 |
| The Inside | Ronald Ewing | 2005 |
| Lords of Dogtown | Donnie | 2005 |
| The Kiss | Peter | 2005 |
| The Grudge | Matthew / Matthew Williams | 2004 |
| Lost | Dr. Ethan Rom | 2004 |
| Suspect Zero | Bill Grieves | 2004 |
| Minority Report | Hotel Clerk | 2002 |
| Vanilla Sky | Clubgoer | 2001 |
| In the Bedroom | Richard Strout | 2001 |
| Crossing Jordan | Henry Bishop | 2001 |
| Swordfish | Gabriel's Crew | 2001 |
| Almost Famous | Bartender | 2000 |
| Mission: Impossible II | Wallis | 2000 |
| The 72nd Annual Academy Awards | Self - Audience Member | 2000 |
| Magnolia | WDKK Show Director's Assistant | 1999 |
| The Unknown Cyclist | By-Stander / By Stander | 1998 |
| Without Limits | Bob Peters | 1998 |
| Born on the Fourth of July | Platoon / Platoon - Vietnam | 1989 |
| On Sacred Ground | Daniel McKinney | 1980 |
Producer Filmography
| Title | Year |
|---|
| Son of Monarchs | 2021 |
| On Sacred Ground | 1980 |
