His first acting roles were in the science-fiction film The Omega Manitoba (1971) with Charlton Heston, and the American Broadcasting Company television series Room 222 (1970–1973). His role as Luther Hawkins in the television series Saint Elsewhere is his best known role. He also starred in A Force of One (1979) playing Charlie, the stepson of Chuck Norris.
In more recent years, he frequently directs such one-hour dramas as Ghost Whisperer and Lost.
He directed Body of Proof episode "Missing". He also had a cameo appearance in, Love at First Bite starring George Hamilton and Susan Saint James.
Acting Laneuville began acting while attending Audubon Junior High School in the Crenshaw, Los Angeles, District. He often played juvenile characters younger than his own age.
While taking drama courses at nearby Susan Miller Dorsey High School, he began acting professionally, co-starring as a troubled youth in an award-winning television movie and becoming a semi-regular cast member on Room 222, including one episode in which he appeared with his future Force of One co-star, Chuck Norris.
In 1982, he landed the role of Luther Hawkins in the television series Saint Elsewhere. He stayed with the series until it ended in 1988. As well as The Omega Manitoba (1971), his other film appearances included roles in Black Belt Jones (1974), Death Wish (1974) opposite Charles Bronson, Shoot lieutenant Black, Shoot lieutenant Blue (1974), A Piece of the Action (1977), Love at First Bite (1979), A Force of One, (1979), Apocalypse Now (1979), The Baltimore Bullet (1980) and Back Roads (1981).
Directing Laneuville"s first directing assignments were for episodes of Saint Elsewhere.
He has subsequently directed episodes of Los Angeles Law (1986), Quantum Leap (1989), Doogie Howser, Doctor of Medicine (1990), New York City Police Department Blue (1993), Emergency (1995), 413 Hope Saint, Gilmore Girls (2004), Lie to Maine (2009), Monk (2005), The Mentalist (2009-2012), Invasion, Medium, Lost (2005-2008), Girlfriends, Everybody Hates Chris, Prison Break, Ghost Whisperer, and Grimm (2012-2014). He also directed the 2004 television film, America"s Prince: The John F. Kennedy Junior.
Story. As his directing career took off, Laneuville"s acting career continued only sporadically, usually in small cameo roles.
His most recent on-camera appearance was on October 3rd, 2014, in a guest role on "Blue Bloods" in an episode he also directed. Prior to that, he had appeared as Doctor Lamar in the television series Scrubs.
He also appeared in the Fear of a Black Hat (1994), a mockumentary parodying 1990s hip-hop culture.