Acting · Orange, Connecticut, USA · Born July 30, 1947
William Atherton Knight Jr. (born July 30, 1947) is an American actor, best known for portraying Richard Thornburg in Die Hard and its sequel and Walter Peck in Ghostbusters.
MovieWhere Did the Adults Go?
2025
as The Father
MovieGhostbusters: Frozen Empire
2024
as Mayor Walter Peck
TVReunited Apart
2020
as Self
MovieCleanin' Up the Town: Remembering Ghostbusters
2020
as Self
MovieBad Company
2018
MovieClinical
2017
as Terry Drummond
MovieGhostheads
2016
as Self
MovieJinn
2014
as Father Westhoff
MovieThe Citizen
2012
MovieJersey Shore Shark Attack
2012
as Dolan
MovieTim and Eric's Billion Dollar Movie
2012
as Earle Swinter
TVWorkaholics
2011
as Thor Holmvik
MovieThe Kane Files: Life of Trial
2010
as Daniel Morgan
TVCastle
2009
as Ari Weiss
TVChildrens Hospital
2008
as Levon Bainter
MovieGhouls
2008
as Stefan
MovieBlack Crescent Moon
2008
as Jo Dexton
MovieAces 'N' Eights
2008
as Howard
TVLife
2007
as Mickey Rayborn
MovieThe Girl Next Door
2007
as Adult David Moran
MovieKush
2007
as King
MovieTowards Darkness
2007
as John
MovieInto the Sun
2005
as Agent Block
MovieHeadspace
2005
as Dr. Ira Gold
TVNumb3rs
2005
as Warren Pierce
MovieGone But Not Forgotten
2005
as Sen. Ray Colby
TVDesperate Housewives
2004
as Dr. Barr
TVBoston Legal
2004
as A.D.A. Howard Zale
TVLost
2004
as Donald Reynolds
MovieWho's Your Daddy?
2004
as Duncan Mack
MovieThe Last Samurai
2003
as Winchester Rep
TVMonk
2002
as Commander Nathan Whitaker
TVJustice League
2001
as Dr. Destiny / John Dee (voice)
MovieRace to Space
2001
as Ralph Stanton
TVNight Visions
2001
as William Price (segment "Hate Puppet")
MovieBurning Down the House
2001
as Arthur Kranston
MovieBread and Roses
2000
as Party Guest (uncredited)
MovieThe Crow: Salvation
2000
as Nathan Randall
MovieThe Stranger
1999
TVLaw & Order: Special Victims Unit
1999
as Ned Bogden
MovieIntroducing Dorothy Dandridge
1999
as Darryl Zanuck
MovieMichael Kael vs. the World News Company
1998
as James Denit
MovieMad City
1997
as Dohlen
MovieExecutive Power
1997
as President Fields
MovieHoodlum
1997
as Thomas E. Dewey
TVStargate SG-1
1997
as Emissary Varta
TVThe Practice
1997
as D.A. Keith Pratt
MovieRaven Hawk
1996
as Philip Thorne
TVNash Bridges
1996
as Dr. Linus Mills
MovieBio-Dome
1996
as Dr. Noah Faulkner
MovieBroken Trust
1995
as Neil Roemer
MovieA Night to Die For
1995
as Self
MovieVirus
1995
as Dr. Reginald Holloway
TVThe Outer Limits
1995
as Franklin Murdoch
MovieFrank & Jesse
1994
as Allan Pinkerton
MovieSaints and Sinners
1994
as Terence
MovieThe Pelican Brief
1993
as Bob Gminski
TVHBO First Look
1992
MovieChrome Soldiers
1992
as Sheriff Blackwell
MovieDiagnosis Murder: Diagnosis of Murder
1992
as Eric Walker
MovieOscar
1991
as Overton
MovieGrim Prairie Tales
1990
as Arthur
TVLaw & Order
1990
as Don Snyder
MovieDie Hard 2
1990
as Richard Thornberg
MovieBuried Alive
1990
as Cort van Owen
Max Monroe: Loose Cannon
1990
as Sloane
TVTales from the Crypt
1989
as Malcolm Mayflower
MovieIntrigue
1988
as Doggett
MovieDie Hard
1988
as Richard Thornburg
MovieThe Equalizer - The Movie: Blood & Wine
1987
as Martin 'Alpha' Loeber
MovieNo Mercy
1986
as Allan Deveneux
MovieA Fight for Jenny
1986
as Michael Rosen
TVThe Twilight Zone
1985
as Brian Wolfe (segment "Night of the Meek")
TVThe Equalizer
1985
as Martin 'Alpha' Loeber
MovieReal Genius
1985
as Professor Hathaway
TVMurder, She Wrote
1984
as Larry Holleran
MovieGhostbusters
1984
as Walter Peck
MovieMalibu
1983
as Stan Harvey
MovieTomorrow's Child
1982
as Jim Spence
The House of Mirth
1981
as Lawrence Selden
TVCentennial
1978
as Jim Lloyd
MovieLooking for Mr. Goodbar
1977
as James
MovieIndependence
1976
as Benjamin Rush
MovieThe Hindenburg
1975
as Boerth
MovieThe Day of the Locust
1975
as Tod Hackett
MovieThe Sugarland Express
1974
as Clovis Poplin
MovieClass of '44
1973
as Fraternity President
MovieThe New Centurions
1972
as Johnson
MovieMidnight Men: A John Schlesinger and Michael Childers Story
