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William Mapother
View on Wikipediafrom Wikipedia
William Reibert Mapother Jr.[1] (/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.
Key Information
Early life and education
[edit]![[icon]](https://en.wikipedia.org/wiki/File:Wiki_letter_w_cropped.svg){kind=small} | This section needs expansion. You can help by adding to it. (April 2024) |
Mapother was born in Louisville, Kentucky, the son of Louisa (née Riehm) and William Reibert Mapother Sr.[2] 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
[edit]Mapother has become a man that has 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.[3]
Awards
[edit]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.[4]
Filmography
[edit]Film
[edit]| 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 |
Television
[edit]| 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
[edit]| Year | Title | Role | Notes |
|---|---|---|---|
| 2010 | Fallout: New Vegas | Colonel James Hsu | |
| 2012 | Hitman: Absolution | Agent 47 | Motion capture |
| 2016 | Hitman | Dino Bosco |
See also
[edit]References
[edit]- ^ William Mapother Tribute to William Sr.
- ^ William Mapother Biography (1965–), filmreference.com
- ^ Imagery From Inside 'The Atticus Institute'
- ^ "Awads Nominations for William Mapother". TVguide.
External links
[edit]William Mapother
View on Grokipediafrom Grokipedia
William Reibert Mapother Jr. (born April 17, 1965) is an American actor, entrepreneur, and former educator best known for his portrayal of the enigmatic Ethan Rom on the ABC series Lost (2004–2010).[1] Born in Louisville, Kentucky, to attorney and judge William Reibert Mapother Sr. and Louisa Riehm Mapother, he is the first cousin of actor Tom Cruise, as their fathers were brothers; Mapother has appeared in five of Cruise's films, often in supporting roles.[2] He earned a bachelor's degree in English literature from the University of Notre Dame and later trained at the D.W. Brown Acting School in Santa Monica, California.[1] Before entering acting, Mapother taught English and drama to students in grades 7 through 12 at schools in East Los Angeles.[3]
Mapother made his film debut in an uncredited role in Oliver Stone's Born on the Fourth of July (1989), marking the first of his collaborations with cousin Tom Cruise.[1] His breakthrough came with the critically acclaimed independent drama In the Bedroom (2001), where he played the volatile Richard Strout, earning an ensemble cast nomination at the 2002 Screen Actors Guild Awards.[3] Other notable film roles include tech executive Wallis in Mission: Impossible II (2000), military official Leo Crow's associate in Minority Report (2002), and supporting parts in Magnolia (1999), The Grudge (2004), Suspect Zero (2004), and Another Earth (2011).[1] On television, beyond Lost, he has guest-starred as Agent Chris Franco on Prison Break (2009), Ian Corbin on Criminal Minds (2008), and various characters on shows including CSI: Crime Scene Investigation, The Mentalist, Grimm, Supergirl, and MacGyver.[1]
In recent years, Mapother has continued acting in projects such as the Western Outlaw Posse (2024) as Angel, the Lifetime thriller Black Girl Missing (2023) as Russell, and the legal drama series Suits: L.A. (2025), in which he appeared as Greg Fisher.[4] Beyond performing, he served on the National Board of Directors for the Screen Actors Guild from 2007 to 2010 and co-founded the Flyover Film Festival to support filmmakers in the American heartland.[1] Mapother is also a founding partner and former CEO of Slated, a technology platform that connects independent filmmakers with financing and distribution opportunities.[3]
Notable among these is his motion capture work for Agent 47 in Hitman: Absolution, where Mapother initially provided both voice and performance capture before the voice role reverted to series veteran David Bateson due to fan feedback, though his physical performance remained in the final product.[47] This role underscores the technical demands of early 2010s motion capture, involving full-body scanning and facial animation to create seamless interactive sequences.[48] His voice portrayal of Colonel Hsu in Fallout: New Vegas exemplifies a authoritative military presence in a post-apocalyptic setting, contributing to the game's narrative depth through dialogue trees and faction interactions. These contributions, while sporadic, reflect Mapother's versatility in bridging live-action intensity with the immersive demands of voice-over and capture in gaming.
Early life and education
Family background
William Mapother was born on April 17, 1965, in Louisville, Kentucky, as William Reibert Mapother Jr., to parents Louisa Riehm Mapother and William Reibert Mapother Sr.[1] His father worked as an attorney, bankruptcy consultant, and judge in Louisville.[1] The family had English, German, and Irish ancestry, with roots tied to the local community in Kentucky.[1] Mapother grew up with two sisters, Amy and Katherine, making him the only boy in the household.[5] Both sisters shared his interest in the arts, with Amy later pursuing acting alongside him.[5] The siblings were part of the broader Mapother clan, which included first cousin Tom Cruise (born Thomas Cruise Mapother IV), whose father, Thomas Cruise Mapother III, was the brother of William Sr.[2] This familial connection provided an early link to Hollywood, as Cruise's rising fame brought indirect exposure to the entertainment world even during Mapother's youth.[6] Raised in Louisville, Mapother's childhood was influenced by a family environment that encouraged performance and creativity among the relatives.[7] As the only boys among their respective siblings—Mapother with his two sisters and Cruise with three— the cousins frequently sought each other's company for camaraderie and protection from the "strong verbal women" in their lives, fostering a close bond during their formative years in Kentucky.[7] This dynamic offered Mapother an early, albeit informal, immersion in expressive activities through familial ties.[7]Academic background
William Mapother earned a Bachelor of Arts degree in English from the University of Notre Dame in 1987.[8] During his studies, he demonstrated a strong passion for literature, particularly engaging with Romantic poetry such as John Keats' works, including the concept of "negative capability"—the ability to embrace uncertainties and embody diverse perspectives without preconceived notions.[9] This intellectual pursuit, highlighted by his English professor Gregory Kucich, who noted Mapother's standout intelligence and enthusiasm in class discussions, likely fostered his early interest in storytelling and character immersion.[9] On campus, Mapother served as head of the Notre Dame Squash Club, where he balanced academics with extracurricular activities and even continued literary conversations with faculty, such as debating Keats during informal games.[9] His modest demeanor extended to his family ties to Hollywood—his cousin Tom Cruise's success subtly motivated an exploration of creative fields like screenwriting and theater, though he rarely highlighted the connection.[9] These experiences in literature and performance-oriented analysis at Notre Dame laid a foundational appreciation for narrative depth that informed his later pursuits. Following graduation, Mapother took a three-year gap to teach English to grades seven through twelve at schools in East Los Angeles, applying his academic training in literature to mentor young students and further honing his skills in communication and empathy-building.[3][10] This period of educational service directly bridged his university-honed expertise in storytelling to initial explorations in the creative industries, before transitioning fully into acting.[11]Acting career
Early roles
William Mapother made his acting debut in 1989 with a minor role as a Vietnam platoon member in Oliver Stone's Born on the Fourth of July, a film starring his cousin Tom Cruise.[12] This uncredited appearance marked his initial entry into Hollywood, facilitated in part by family connections, as Mapother's familial tie to Cruise provided early networking opportunities in an industry often reliant on personal referrals.[6] Following his debut, Mapother faced a significant hiatus from on-screen work, during which he pursued behind-the-scenes roles to build industry experience. After graduating from the University of Notre Dame with a B.A. in English—which honed his script analysis skills—he taught as a substitute in East Los Angeles for three years, then worked as a production assistant on three films and in script and project development for two years.[13] Seeking formal training, he relocated to New York to direct an off-off-Broadway play and take acting classes, before returning to Los Angeles for improv workshops and a two-year Meisner technique program at the Baron Brown Studio.[13] This period of transition from education and industry support roles to professional acting underscored the challenges of breaking in, including the competitive nature of auditions and the need for persistent self-training without immediate breakthroughs.[13] By the late 1990s, Mapother resumed acting with small supporting parts that helped establish his resume. In 1998, he appeared as Bob Peters in Without Limits, a biographical sports drama, and as Josh Riddell in the short film Trickle.[14] The following year, he had a bystander role in The Unknown Cyclist and played the WDKK Show Director's Assistant in Paul Thomas Anderson's ensemble film Magnolia.[14] In 2000, he portrayed Wallis, a henchman, in Mission: Impossible II—another Cruise-led project—and filmed a bartender scene for Almost Famous that was ultimately deleted.[14] These minor credits, often in high-profile productions, reflected ongoing typecasting in background or antagonistic supporting roles while he navigated the hurdles of limited visibility and sporadic opportunities in the pre-2000s Hollywood landscape.[13]Breakthrough and notable performances
Mapother's breakthrough role came in Todd Field's 2001 drama In the Bedroom, where he portrayed Richard Strout, the volatile and abusive ex-husband whose jealousy escalates into murder, serving as the film's central antagonist.[15] His performance was memorable for capturing the character's cocky entitlement and clueless menace, contributing to the film's critical acclaim and five Academy Award nominations.[15] Critics highlighted Mapother's ability to embody a spoiled, working-class villain whose unhinged presence drives the narrative's exploration of grief and vengeance.[16] In television, Mapother elevated his profile with the recurring role of Dr. Ethan Rom on ABC's Lost from 2004 to 2005, appearing in six episodes across the first two seasons. As a surgeon and operative for the enigmatic Others, Ethan's arc begins as a seemingly helpful survivor but reveals him as an infiltrator who kidnaps Claire Littleton to exploit her pregnancy, deepening the series' mythology around the island's hostile inhabitants.[17] His character's cold manipulation and violent confrontations, culminating in a brutal death at the hands of Charlie Pace, introduced lasting tension and paranoia among the survivors, marking one of the show's early twists that expanded its lore.[18] Throughout these performances, Mapother's acting style stood out for its restrained intensity in dramatic scenes, blending subtle menace with explosive volatility to heighten emotional stakes. In In the Bedroom, his tense, wound-up portrayal of Strout conveyed simmering rage without overplaying, earning notes for its raw authenticity.[19] For Ethan Rom, Mapother delivered a chilling ordinariness that masked calculating threat, avoiding caricature while amplifying the horror, as one review observed: "he is cold and calculating, and part of what makes him so terrifying is how ordinary he seems."[18] Co-star Tom Wilkinson, in discussing the In the Bedroom ensemble, praised the cast's collective ability to sustain quiet fury, crediting Mapother's contribution to the film's unflinching realism.[20]Recent work
Mapother's recent acting career, beginning in 2011, has showcased his versatility across independent cinema and television, often in roles that delve into psychological depth and moral ambiguity. He took on a lead role as John Burroughs, a grieving composer confronting parallel realities, in the sci-fi drama Another Earth, directed by Mike Cahill, which premiered at the Sundance Film Festival and earned critical acclaim for its introspective exploration of regret and redemption.[21] This performance highlighted Mapother's ability to anchor emotionally complex narratives in low-budget, genre-bending projects. In television, Mapother appeared in guest spots that emphasized his knack for portraying intense antagonists. He played Richard Haibach, a cunning crime boss, across four episodes of The Mentalist from 2011 to 2014, contributing to the series' procedural tension through his chilling depiction of a manipulative figure evading justice.[22] His work extended to other procedurals, including a role in Constantine (2014) as the demon Jacob Shaw, blending supernatural horror with character-driven intrigue. He continued with guest roles such as Bruce Ackerman in 9-1-1: Lone Star (2020) and Special Agent Travis Russell in FBI: Most Wanted (2021), showcasing authority figures in high-stakes scenarios.[23] Mapother continued to prioritize independent films in the 2020s, reflecting an evolution toward character-focused stories in diverse genres. In Son of Monarchs (2021), he portrayed Bob, a supportive colleague to the protagonist in this semi-autobiographical drama about identity and environmental loss amid monarch butterfly migrations in Mexico.[24] He led as Daniel McKinney, a PTSD-afflicted veteran journalist navigating the Dakota Access Pipeline protests, in the socially conscious thriller On Sacred Ground (2023), which drew from real events to examine corporate greed and indigenous rights.[25] In the Lifetime thriller Black Girl Missing (2023), he played Russell, a detective involved in a missing persons case highlighting racial disparities.[26] In 2024, Mapother shifted to Western territory as the villainous Angel in Outlaw Posse, a revenge tale directed by Mario Van Peebles, where his nuanced portrayal added emotional layers to the antagonist. By 2025, Mapother maintained his television presence with a guest role as Greg Fisher in the premiere season of Suits LA, appearing in the episode "Slugfest" to support the legal drama's ensemble dynamics.[27] This output underscores his sustained relevance in both streaming and festival circuits, favoring indie productions that allow for substantive character exploration over mainstream blockbusters.Other professional activities
Involvement in film financing
In 2010, William Mapother co-founded Slated, an innovative online marketplace designed to connect independent filmmakers with investors, alongside partners including Stephan Paternot, Duncan Cork, and Gavan Gravesen.[28] The platform emerged as a response to the challenges faced by indie projects in securing funding, leveraging technology to streamline the financing process for feature films.[29] Slated's core features include data-driven project evaluation tools that use predictive analytics to assess a film's commercial potential, enabling investors to make informed decisions based on factors like script quality, talent attachments, and market trends.[30] It also facilitates matchmaking by pairing projects with financing sources, talent agencies, and distributors, often resulting in comprehensive packaging deals that expedite production.[30] The impact of Slated on independent cinema has been substantial, with the platform supporting the financing, packaging, or distribution of over 70 films by 2025, many of which have achieved critical acclaim and awards recognition.[31] Notable examples include The Kill Room (2023), starring Samuel L. Jackson and Uma Thurman, which received financing through Slated and premiered at the Venice Film Festival; Oh, Canada (2024), directed by Paul Schrader and featuring Richard Gere and Uma Thurman, bolstered by Slated's financial backing; and Hazard (2025), starring Sosie Bacon and directed by Eddie Mensore, which utilized the platform for both packaging and funding.[31] These successes demonstrate Slated's role in democratizing access to capital, allowing diverse stories—such as LGBTQ+ narratives in Our Son (2023) and animated biopics like The Inventor (2023)—to reach global audiences and contribute to the vitality of indie filmmaking.[31]Additional contributions
Mapother has extended his involvement in the film industry through producing roles on independent projects. He served as producer on the 2023 drama On Sacred Ground, a film addressing Native American boarding school survivors, and as co-executive producer on the 2020 Sundance-premiered Son of Monarchs, which explores themes of identity and migration through a Mexican biologist's story. Additionally, he acted as executive producer for the 2020 TV series Save Me (10 episodes).[32] Mapother served on the National Board of Directors for the Screen Actors Guild from 2007 to 2010.[1] He also co-founded the Flyover Film Festival to support filmmakers in the American heartland.[1] Beyond production, Mapother has contributed to emerging talent by sharing insights on the acting craft. In a 2011 guest post for SAG-AFTRA's indie blog, he offered practical advice to independent film actors, drawing from his experiences in low-budget productions like Another Earth, emphasizing preparation, collaboration, and resilience in the industry.[33] Mapother has also engaged in industry discussions through guest appearances on podcasts, where he reflects on acting techniques and career navigation. In a 2017 episode of The Hatch: A Lost Podcast, he discussed his portrayal of Ethan Rom, highlighting character development and on-set improvisation. More recently, in 2023, he appeared on the Kentucky Call Sheet podcast, conversing about his Louisville roots, acting process, and support for independent storytelling up to contemporary projects.[34]Filmography
Film roles
Mapother's film career spans a variety of roles in both mainstream and independent cinema, often in supporting capacities. His credits include appearances in high-profile productions directed by notable filmmakers as well as contributions to indie features. Below is a comprehensive chronological table of his feature film roles from 1989 to 2025, drawn from verified credits. Role types (lead, supporting, or uncredited) are indicated based on billing and prominence where discernible.| Year | Title | Role | Director | Role Type |
|---|---|---|---|---|
| 1989 | Born on the Fourth of July | Platoon | Oliver Stone | Supporting |
| 1998 | Without Limits | Bob Peters | Robert Towne | Supporting |
| 1999 | Magnolia | WDKK Show Director's Asst. | Paul Thomas Anderson | Supporting |
| 1999 | The Unknown Cyclist | Bystander | Bernard Salzmann | Supporting |
| 2000 | Almost Famous | Recruiter | Cameron Crowe | Supporting |
| 2000 | Mission: Impossible II | Wallis | John Woo | Supporting |
| 2001 | Vanilla Sky | Clubgoer | Cameron Crowe | Uncredited |
| 2001 | Swordfish | Gabriel's Crew | Dominic Sena | Supporting |
| 2001 | In the Bedroom | Richard Strout | Todd Field | Supporting |
| 2002 | Minority Report | Hotel Clerk | Steven Spielberg | Supporting |
| 2004 | The Grudge | Matthew Williams | Takashi Shimizu | Supporting |
| 2004 | Suspect Zero | Bill Grieves | E. Elias Merhige | Supporting |
| 2005 | Lords of Dogtown | Donnie | Catherine Hardwicke | Supporting |
| 2005 | The Zodiac | Inspector Dale Coverling | Alexander Bulkley | Supporting |
| 2006 | World Trade Center | Sgt. Thomas | Oliver Stone | Supporting |
| 2006 | Ask the Dust | Bill | Robert Towne | Supporting |
| 2007 | Moving McAllister | Bob | Andrew Black | Supporting |
| 2007 | Moola | Steve | Don Most | Supporting |
| 2008 | The Burrowers | William Parcher | J.T. Petty | Supporting |
| 2011 | Another Earth | John Burroughs | Mike Cahill | Supporting |
| 2011 | Citizen Gangster | Det. Rhys | Nathan Morlando | Supporting |
| 2012 | FDR: American Badass! | Dr. Ellington | Garrett Brawith | Supporting |
| 2012 | Static | Greg Wagner | Todd Levin | Supporting |
| 2013 | It's Dark Here | David Tennies | Michael Brandon | Lead |
| 2013 | Underdogs | Bill Burkett | Doug Dearth | Supporting |
| 2013 | Jobs | Calligraphy Professor | Joshua Michael Stern | Supporting |
| 2014 | I Origins | Darryl | Mike Cahill | Supporting |
| 2015 | Blackhat | Rich Donahue | Michael Mann | Supporting |
| 2015 | The Atticus Institute | Dr. Jonathan Reed | Chris Sparling | Supporting |
| 2016 | Tell Me How I Die | Dr. Felix | D.J. Viola | Supporting |
| 2020 | Son of Monarchs | Bob | Alexis Gambis | Supporting |
| 2023 | On Sacred Ground | Daniel McKinney | Jace Daniel | Lead |
| 2024 | [Outlaw Posse](/page/Outlaw Posse) | Angel | Mario Van Peebles | Supporting |
Television roles
Mapother's television career began in the early 2000s with guest appearances on procedural dramas, establishing him as a versatile supporting actor in crime and mystery series.[14] His roles often featured intense, enigmatic characters, appearing across networks like CBS, ABC, and NBC, as well as streaming platforms in later years.[35] Early credits include single-episode guest spots on CSI: Crime Scene Investigation as Douglas Sampson in 2002, Law & Order: Special Victims Unit as Luke Edmunds in 2003, Touched by an Angel as Eddie in 2003, Line of Fire as Larry in 2004, CSI: Miami as Pete Keller in 2004, and NCIS as Kyle Grayson in 2004.[14] These appearances showcased his ability to portray complex antagonists in episodic formats.[23] A significant recurring role came in 2004–2005 on Lost, where he played Dr. Ethan Rom in 7 episodes, contributing to the series' early mystery arcs as a member of the enigmatic Others group. Following this, he appeared in The Inside as Ronald Ewing in 2005, Threshold as Gunneson in 2005, and Crossing Jordan as Henry Bishop in 2005, all in single episodes.[14] In 2007, Mapother guest-starred as Sweet Lenny Collins in Viva Laughlin and as Gordon Wix in K-Ville, both short-lived series.[23] The 2008 TV movie Skip Tracer featured him as Henry Hargrove Jr., a key role in the debt-collection thriller directed by Stephen Frears. That year, he also played Ian Corbin in an episode of Criminal Minds.[36] Later 2000s roles included Agent Chris Franco in Prison Break in 2009 and Guy Rich (voice) in WordGirl in 2009, alongside a return to NCIS as Colonel Merton Bell in 2 episodes in 2009.[36] Entering the 2010s, he voiced Gavin in The Young and the Restless in 2010, played Sam Fisher in Human Target in 2010, and John Silvestri in Law & Order: Criminal Intent in 2010.[14] Mapother reprised Ethan Rom in the 2008 web miniseries Lost: Missing Pieces. In 2011 and 2013, he portrayed Richard Haibach in 2 episodes of The Mentalist, a serial killer suspect central to a multi-season storyline.[37] Other 2010s guest spots encompassed Delroy Bagwell in Justified (2012), Garrett in Burn Notice (2012), a Driver in American Horror Story (2012), Randall Walsh in Mad Men (2013), and Carl Matthews in Castle (2013).[36] He also appeared as Agent Steve Fisher in The Following (2015) and Jacob Porter in Lethal Weapon (2018).[23] Into the 2020s, Mapother continued with guest roles such as Bruce Ackerman in 9-1-1: Lone Star (2020) and Travis Russell in FBI: Most Wanted (2021).[38] In 2023, he starred as Russell in the Lifetime TV movie Black Girl Missing, a thriller about a woman's disappearance. His most recent credit is as Greg Fisher in 1 episode of Suits: L.A. in 2025, a legal drama spin-off.[39]| Year | Series/Miniseries/TV Movie | Role | Episodes |
|---|---|---|---|
| 2002 | CSI: Crime Scene Investigation | Douglas Sampson | 1 |
| 2003 | Law & Order: Special Victims Unit | Luke Edmunds | 1 |
| 2003 | Touched by an Angel | Eddie | 1 |
| 2004 | Line of Fire | Larry | 1 |
| 2004 | CSI: Miami | Pete Keller | 1 |
| 2004 | NCIS | Kyle Grayson | 1 |
| 2004–2005 | Lost | Dr. Ethan Rom | 7 |
| 2005 | The Inside | Ronald Ewing | 1 |
| 2005 | Threshold | Gunneson | 1 |
| 2005 | Crossing Jordan | Henry Bishop | 1 |
| 2007 | Viva Laughlin | Sweet Lenny Collins | 1 |
| 2007 | K-Ville | Gordon Wix | 1 |
| 2008 | Skip Tracer (TV movie) | Henry Hargrove Jr. | TV movie |
| 2008 | Criminal Minds | Ian Corbin | 1 |
| 2008 | Lost: Missing Pieces (miniseries) | Ethan Rom | 1 |
| 2009 | Prison Break | Agent Chris Franco | 1 |
| 2009 | WordGirl | Guy Rich (voice) | 1 |
| 2009 | NCIS | Colonel Merton Bell | 2 |
| 2010 | The Young and the Restless | Gavin (voice) | 1 |
| 2010 | Human Target | Sam Fisher | 1 |
| 2010 | Law & Order: Criminal Intent | John Silvestri | 1 |
| 2011–2013 | The Mentalist | Richard Haibach | 2 |
| 2012 | Justified | Delroy Bagwell | 1 |
| 2012 | Burn Notice | Garrett | 1 |
| 2012 | American Horror Story | Driver | 1 |
| 2013 | Mad Men | Randall Walsh | 1 |
| 2013 | Castle | Carl Matthews | 1 |
| 2015 | The Following | Agent Steve Fisher | 1 |
| 2015 | Constantine | Jacob Shaw | 1 |
| 2015 | Minority Report | Charlie Peele | 2 |
| 2016 | Grimm | Dwight Eleazer | 1 |
| 2016 | Supergirl | Dr. Rudy Jones / Parasite | 1 |
| 2017 | MacGyver | Daniel Holt | 2 |
| 2018 | Lethal Weapon | Jacob Porter | 1 |
| 2020 | 9-1-1: Lone Star | Bruce Ackerman | 1 |
| 2021 | FBI: Most Wanted | Travis Russell | 1 |
| 2023 | Black Girl Missing (TV movie) | Russell | TV movie |
| 2025 | Suits: L.A. | Greg Fisher | 1 |
Video game roles
William Mapother has contributed to video games primarily through voice acting and motion capture, marking a niche extension of his acting career that spans the late 2000s to the 2010s, with fewer roles compared to his extensive live-action work in film and television.[40] His involvement highlights his vocal range in portraying military figures, dispatch operators, and antagonistic characters in high-profile titles, often utilizing performance capture techniques to enhance interactive storytelling.[23] Mapother's video game credits include both prominent voice roles and specialized motion capture performances, demonstrating his adaptability to digital media.| Year | Title | Role | Type | Source |
|---|---|---|---|---|
| 2010 | Halo: Reach | Air Control / Dispatch | Voice | [41] |
| 2010 | Fallout: New Vegas | Colonel James Hsu | Voice | [42] |
| 2012 | The Secret World | Paul Gamelin | Voice | [43] |
| 2012 | Hitman: Absolution | Agent 47 | Motion capture | [44] |
| 2013 | Lightning Returns: Final Fantasy XIII | Additional Voices | Voice | [45] |
| 2016 | Hitman | Dino Bosco | Voice | |
| 2021 | Hitman III | Dino Bosco | Archive sound | [46] |