| Trailer for a Remake of Gore Vidal's Caligula | 2005 | writer |
| Dimenticare Palermo | 1990 | writer |
| Billy the Kid | 1989 | writer |
| Lincoln | 1988 | writer |
| The Sicilian | 1987 | writer |
| Dress Gray | 1986 | writer |
| Caligula | 1979 | writer |
| Recht in eigen hand | 1973 | writer |
| Besuch auf einem kleinen Planeten | 1971 | writer |
| Myra Breckinridge | 1970 | writer |
| The Last of the Mobile Hot Shots | 1970 | writer |
| Poseta maloj planeti | 1967 | writer |
| Paris brle-t-il? | 1966 | writer |
| Theatre 625 | 1966 | writer |
| The Doctor and the Devil | 1965 | writer |
| The Best Man | 1964 | writer |
| Gevoel voor recht | 1962 | writer |
| The Chevy Mystery Show | 1960 | writer |
| Startime | 1960 | writer |
| Visit to a Small Planet | 1960 | writer |
| Suddenly, Last Summer | 1959 | writer |
| Sunday Showcase | 1959 | writer |
| Ben-Hur | 1959 | writer |
| The Scapegoat | 1959 | writer |
| ITV Television Playhouse | | writer |
| Dark Possession | 1959 | writer |
| Teatr telewizji | 1958 | writer |
| TV Teatro | 1958 | writer |
| Armchair Theatre | 1958 | writer |
| The Left Handed Gun | 1958 | writer |
| I Accuse! | 1958 | writer |
| Matinee Theatre | | writer |
| Playwrights '56 | 1956 | writer |
| The Catered Affair | 1956 | writer |
| General Electric Theater | 1956 | writer |
| The Milton Berle Show | | writer |
| Climax! | 1955 | writer |
| Repertory Theatre | 1955 | writer |
| Goodyear Playhouse | 1955 | writer |
| Studio One in Hollywood | | writer |
| The Best of Broadway | 1955 | writer |
| Danger | 1955 | writer |
| Omnibus | | writer |
| Janet Dean, Registered Nurse | 1954 | writer |
| Suspense | 1954 | writer |
| The Telltale Clue | 1954 | writer |
| Shrink | 2009 | actor |
| Family Guy | 2006 | actor |
| Jack & Bobby | 2005 | actor |
| Igby Goes Down | 2002 | actor |
| Gattaca | 1997 | actor |
| Shadow Conspiracy | 1997 | actor |
| With Honors | 1994 | actor |
| Bob Roberts | 1992 | actor |
| Billy the Kid | 1989 | actor |
| Laugh-In | 1978 | actor |
| Laugh-In | 1971 | actor |
| The Best Man | 1964 | actor |
| Suddenly, Last Summer | 1959 | actor |
| Sunday Showcase | 1959 | actor |
| Ritual in Transfigured Time | 1946 | actor |
| Scotty and the Secret History of Hollywood | 2017 | thanks |
| Salat Kaligula | 2015 | thanks |
| On the Road | 2012 | thanks |
| Valentino: The Last Emperor | 2008 | thanks |
| Inside Deep Throat | 2005 | thanks |
| The Life Aquatic with Steve Zissou | 2004 | thanks |
| Dad Strangelove | | self |
| Broadway: Beyond the Golden Age | 2018 | self |
| A Documentary on the Making of 'Gore Vidal's Caligula' | 2018 | self |
| Salinger | 2013 | self |
| Gore Vidal: The United States of Amnesia | 2013 | self |
| Smiling Through the Apocalypse | 2013 | self |
| Paul Bowles: The Cage Door is Always Open | 2012 | self |
| Valentino's Ghost | 2012 | self |
| Theater Talk | 2012 | self |
| 2plus2makes4 | 2011 | self |
| The Strange History of Don't Ask, Don't Tell | 2011 | self |
| Wilde Salom | 2011 | self |
| Rediscovering Alexander Hamilton | 2010 | self |
| The 15th Annual Satellite Awards | 2010 | self |
| Moguls & Movie Stars: A History of Hollywood | 2010 | self |
| Norman Mailer: The American | 2010 | self |
| Standing Army | 2010 | self |
| Charlie Rose | 1995-2009 | self |
| Real Time with Bill Maher | 2004-2009 | self |
| Imagine | 2009 | self |
| Dangerous Dynasty: The Bush Legacy | 2009 | self |
| History of the National Security State | 2008 | self |
| US Election Night | 2008 | self |
| Beyond Nixon | 2008 | self |
| Murder, Spies & Voting Lies: The Clint Curtis Story | 2008 | self |
| Zero: An Investigation Into 9/11 | 2008 | self |
| Democracy Now! | 2003-2008 | self |
| Sunday AM | 2008 | self |
| Channel 4 News | 2008 | self |
| Do Not Alter? | 2008 | self |
| TCM Guest Programmer | 2007 | self |
| Obscene | 2007 | self |
| Texas Monthly Talks | 2007 | self |
| Tavis Smiley | 2006 | self |
| The Simpsons | 2006 | self |
| The U.S. vs. John Lennon | 2006 | self |
| Global Haywire | 2006 | self |
| Dusty Wright's Culture CatchCulture Catch | 2005 | self |
| Lincoln | 2005 | self |
| The Peace! DVD | 2005 | self |
| L'isola di Calvino | 2005 | self |
| One Bright Shining Moment | 2005 | self |
| Garbo | 2005 | self |
| Trailer for a Remake of Gore Vidal's Caligula | 2005 | self |
| Middle Sexes: Redefining He and She | 2005 | self |
| Inside Deep Throat | 2005 | self |
| Why We Fight | 2005 | self |
| USA the Movie | 2005 | self |
| The Late Late Show with Craig Kilborn | 2004 | self |
| Thinking XXX | 2004 | self |
| Brief History of Disbelief | 2004 | self |
| Da Ali G Show | 2004 | self |
| Federico Fellini - Mit den Augen der Anderen | 2003 | self |
| JFK: The Day That Changed America | 2003 | self |
| American Masters | 1994-2003 | self |
| Gore Vidal: My Life | 2002 | self |
| Arena | 1977-2001 | self |
| Na plovrne | 2001 | self |
| Rescued from the Closet | 2001 | self |
| The Mike & Ben Show | 1999 | self |
| The Burgess Variations | 1999 | self |
| Negro sobre blanco | 1999 | self |
| Avisa'ns quan arribi el 2000 | 1999 | self |
| Thomas Jefferson | 1997 | self |
| Gore Vidal's American Presidency | 1996 | self |
| Lo + plus | 1996 | self |
| Reputations | 1996 | self |
| Clive Anderson Talks Back | 1991-1995 | self |
| Omnibus | 1995 | self |
| Gore Vidal | 1995 | self |
| The Celluloid Closet | 1995 | self |
| In Search of Oz | 1994 | self |
| Ben-Hur: The Making of an Epic | 1993 | self |
| The Great Depression | 1993 | self |
| American Experience | 1993 | self |
| Late Night with Conan O'Brien | 1993 | self |
| Maurizio Costanzo Show | 1993 | self |
| The Clive James Interview | 1991 | self |
| Memory & Imagination: New Pathways to the Library of Congress | 1990 | self |
| Opinions | 1989 | self |
| CBS This Morning | 1989 | self |
| The Pat Sajak Show | 1989 | self |
| The Tonight Show Starring Johnny Carson | 1964-1988 | self |
| Muy personal | 1987 | self |
| ngel Casas Show | 1986 | self |
| National Geographic Explorer | 1985 | self |
| Wogan | 1984 | self |
| Book Four | 1984 | self |
| Gore Vidal: The Man Who Said No | 1984 | self |
| Apostrophes | 1983 | self |
| Tomorrow Coast to Coast | 1981 | self |
| The Mike Douglas Show | 1972-1978 | self |
| Midday with Bill Boggs | 1977 | self |
| The Paul Ryan Show | 1977 | self |
| Bucks County, USA | 1977 | self |
| Mary Hartman, Mary Hartman | 1976 | self |
| Dinah! | 1976 | self |
| The 48th Annual Academy Awards | 1976 | self |
| Read All About It | 1976 | self |
| Success Story | 1975 | self |
| Donahue | 1973-1974 | self |
| Parkinson | 1972 | self |
| The David Frost Show | 1969-1972 | self |
| The Dick Cavett Show | 1968-1972 | self |
| Roma | 1972 | self |
| Review | 1970 | self |
| The Merv Griffin Show | 1967-1970 | self |
| Playboy After Dark | 1969 | self |
| Today | 1967 | self |
| CBS Reports | 1967 | self |
| What's My Line? | 1960-1964 | self |
| The David Susskind Show | 1962 | self |
| The Jack Paar Tonight Show | 1959-1962 | self |
| The Tonight Show | 1962 | self |
| The Mike Wallace Interview | 1959 | self |
| Tricky Dick | 2019 | archive_footage |
| Media Buzz | 2015 | archive_footage |
| Charlie Rose | 2015 | archive_footage |
| Best of Enemies | 2015 | archive_footage |
| The 50 Year Argument | 2014 | archive_footage |
| The 67th Annual Tony Awards | 2013 | archive_footage |
| Democracy Now! | 2012-2013 | archive_footage |
| American Masters | 2012 | archive_footage |
| 9/11 Truth: Hollywood Speaks Out | 2011 | archive_footage |
| American Experience | 2011 | archive_footage |
| Public Speaking | 2010 | archive_footage |
| Hugh Hefner: Playboy, Activist and Rebel | 2009 | archive_footage |
| My Roman Holiday with John Steiner | 2007 | archive_footage |
| XXI Century | 2003 | archive_footage |
| Sex at 24 Frames Per Second | 2003 | archive_footage |
| The Cockettes | 2002 | archive_footage |
| The Tonight Show Starring Johnny Carson | 1992 | archive_footage |
| Forty Years at the I.C.A. | 1987 | archive_footage |
| The Dick Cavett Show | 1973 | archive_footage |
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