| 2024 | Bad Faith | Narrator (voice) |
| 2023 | The American Buffalo (serie) | Narrator (voice) |
| 2023 | Against All Enemies | Narrator |
| 2022 | Jerry Brown: The Disrupter | Self |
| 2022 | Moment of Contact | Narrator (voice) |
| 2022 | The Weight of a Feather: The Liberty Wildlife Story | Narrator |
| 2022 | The U.S. and the Holocaust (serie) | Self - Narrator |
| 2022 | The Last Stand | Narrator (voice) |
| 2022 | A Cloud Never Dies | Narrator (voice) |
| 2021 | The Tent Mender (serie) | as Narrator |
| 2021 | The Co-op Wars | Narrator |
| 2021 | Hemingway (serie) | Narrator (voice) |
| 2021 | The Girl Who Believes in Miracles | Sam Donovan |
| 2021 | Wandering...But Not Lost | Narrator |
| 2021 | Nepal Beyond | Narrator |
| 2021 | Downwinders and the Radioactive West | Narrator (voice) |
| 2021 | Marriner Eccles: Father of the Modern Federal Reserve | Narrator |
| 2020 | The Phenomenon | Narrator (voice) |
| 2020 | Sunseed: The Journey | Narrator (voice) |
| 2020 | Almost Thirteen | Narrator |
| 2019 | Polanski, le travail à l'oeuvre | Self |
| 2019 | Troubled Waters: A Turtle's Tale | Self - Narrator (voice) |
| 2019 | Olompali: A Hippie Odyssey | narrator |
| 2019 | Country Music (serie) | Narrator |
| 2019 | La sonrisa etrusca | Professor |
| 2019 | The Atomic Tree | Narrator |
| 2018 | The Remarkable Life of John Weld | Narrator |
| 2018 | As If They Were Angels | Narrator |
| 2018 | The Mayo Clinic | Narrator |
| 2017 | La Guerra de Vietnam (serie) | Narrator (voice) |
| 2017 | The Beatles, Hippies & Hells Angels: Inside the Crazy World of Apple | Himself - Narrator |
| 2016 | The Reality of Truth | Self |
| 2016 | Who Wants to Live Forever? The Wisdom of Aging. | Himself |
| 2015 | Robert Bly: A Thousand Years of Joy | Self |
| 2015 | The Spoils Before Dying (serie) | Dizzy the Cat |
| 2015 | No Deposit | Police Chief Williams |
| 2015 | A Coup in Camelot | Narrator (voice) |
| 2015 | Girl on the Edge | Hank Taylor |
| 2015 | El precio de la fama | Crooker |
| 2014 | On a Marché sur Bangkok | Burt Lowell |
| 2014 | The Roosevelts: An Intimate History (serie) | Narrator (voice) |
| 2014 | Realm of the Ancient Redwoods | Narrator |
| 2014 | Angel Azul | Narrator |
| 2013 | Paolo Soleri: Beyond Form | Narrator |
| 2013 | The Ghost Army | Narrator (Voice) |
| 2013 | Long Distance Revolutionary: A Journey with Mumia Abu-Jamal | Self |
| 2012 | Rise Above the Mark | Narrator |
| 2012 | The Dust Bowl (serie) | Peter Coyote |
| 2012 | Dangerous Waters (serie) | Self |
| 2012 | Right to Play | Narrator |
| 2012 | Valparaiso | Edward G. Drexler |
| 2012 | Cold War on Ice: Summit Series '72 | Narrator |
| 2011 | Prohibition (serie) | Self - Narrator (voice) |
| 2011 | The Gundown | Thomas Morgan |
| 2011 | I am Fishead | narrator |
| 2011 | Oceans in Glass | Narrator |
| 2011 | Su última voluntad | Judge Garner |
| 2011 | Green Fire | Aldo Leopold (voice) |
| 2011 | This Is Not a Movie | — |
| 2011 | Connected: An Autoblogography About Love, Death & Technology | Narrator (voice) |
| 2010 | Grandes Migraciones (serie) | — |
| 2010 | DiDi Hollywood | Michael McLean |
| 2010 | What If Cannabis Cured Cancer | Narration |
| 2010 | Call of Life: Facing the Mass Extinction | Narrator |
| 2010 | Vampire Forensics | — |
| 2009 | Los gemelos de Mengele | Narrstor (voice) |
| 2009 | For the Rights of All: Ending Jim Crow in Alaska | Self - Narrator (voice) |
| 2009 | Climbing Redwood Giants | Self - Narrator (voice) |
| 2009 | Los parques nacionales: la mejor idea de los Estados Unidos (serie) | Narrator |
| 2009 | With One Voice | Narrator |
| 2009 | Full Color Football: The History of the American Football League (serie) | Himself - Narrator |
| 2009 | Os Mistérios de Lisboa ou What The Tourist Should See | Narrator (voice) |
| 2009 | Torturing Democracy | Narrator |
| 2009 | Huxley on Huxley | Self |
| 2008 | Hope & Redemption: The Lena Baker Story | Elliot Arthur |
| 2008 | Adopt a Sailor | Richard |
| 2008 | A Single Woman | Maury Maverick |
| 2008 | $5 a Day | Burt Kruger |
| 2008 | Alaska Far Away | Narrator |
| 2008 | Dr. Dolittle 4 | President Sterling |
| 2008 | Todos los caminos llevan a casa | Hock |
| 2007 | One Man, One Cow, One Planet | Narrator |
| 2007 | Fog City Mavericks | Self - Narrator (voice) |
| 2007 | Hippies | Self |
| 2007 | The Sunday Man | The Voice |
| 2007 | Strange Culture | Self |
| 2006 | Tras la línea enemiga II: El eje del mal | President Adair T. Manning |
| 2006 | Woody Guthrie: Ain't Got No Home | Narrator (voice) |
| 2006 | AKA Tommy Chong | Himself |
| 2006 | El Evangelio Prohibido de Judas | Narrator |
| 2006 | El Evangelio Prohibido de Judas | — |
| 2005 | Verdades ocultas | Frank |
| 2005 | The War Prayer | Narrator |
| 2005 | El regreso de los muertos vivientes: Danza macabra | Uncle Charles |
| 2005 | El regreso de los muertos vivientes: Necrópolis | Uncle Charles |
| 2005 | Armas, Gérmenes y Acero (serie) | Narrator (voice) |
| 2005 | Deepwater | Herman Finch |
| 2005 | The Inside (serie) | Special Agent Virgil "Web" Webster |
| 2005 | Enron, los tipos que estafaron a América | Narrator |
| 2005 | Commune | self, Black Bear resident |
| 2004 | La sombra del miedo | Congressman Henderson |
| 2004 | Carlos Castaneda: Enigma of a Sorcerer | — |
| 2003 | Bare Knuckle Filming: The Construction Of Northfork | Narrator |
| 2003 | Phenomenon II | John Ringold |
| 2003 | Escrito en sangre | John Traveller |
| 2003 | Bon voyage | Alex Winckler |
| 2003 | The Hebrew Hammer | JJL Chief Bloomenbergensteinenthal |
| 2002 | A Time for Dancing | Wyn Michaels |
| 2002 | Founding Brothers (serie) | — |
| 2002 | Femme Fatale | Watts |
| 2002 | Polanski y los ojos del mal | Himself |
| 2002 | E.T. the Extra-Terrestrial 20th Anniversary Special | Self |
| 2002 | Máximo riesgo.com | Bernard Elias |
| 2002 | Un paseo para recordar | Reverend Sullivan |
| 2001 | Suddenly Naked | Lionel Heathcote |
| 2001 | Neighborhoods: The Hidden Cities of San Francisco - The Fillmore | Voice of Urban Renewal (Voice) |
| 2001 | Juicio a la vida | Stephen Hastings |
| 2001 | In the Light of Reverence | Narrator (voice) |
| 2001 | Jack the Dog | Alfred Stieglitz |
| 2000 | Mas perros que huesos | Detective Darren Cody |
| 2000 | Injusta condena | Dennis Burke |
| 2000 | The Wednesday Woman | Don Wigulow |
| 2000 | The Basket | Martin Conlon |
| 1999 | Execution of Justice | Harvey Milk |
| 1999 | The History of Sex (serie) | Himself - Narrator |
| 1999 | Independent Lens (serie) | — |
| 1999 | Murder on Shadow Mountain | Dennis 'Denny' Traynor |
| 1999 | National Geographic Explorer: The Battle For Midway | Himself - Narrator |
| 1998 | Patch Adams | Bill Davis |
| 1998 | Ruta 9 | Sheriff Dwayne Hogan |
| 1998 | La Ciudad Del Crimen | Doc 'The Butcher' |
| 1998 | Seeds Of Doubt | — |
| 1998 | Karmapa - Two Ways of Divinity | Narrator, English version (voice) |
| 1998 | Rome: Power & Glory (serie) | Narrator |
| 1998 | Esfera | Captain Harold C. Barnes |
| 1998 | Two for Texas | Jim Bowie |
| 1998 | Avalancha: La Muerte Blanca | Narrator |
| 1998 | Les Diggers De San Francisco | — |
| 1997 | The Secrets of 007 | Narrator (voice) |
| 1997 | Camino sin retorno | Gene Gere |
| 1997 | Murder in My Mind | Arthur Lefcourt |
| 1997 | Alaska's Great Wilderness Denali: The Living Edens | Narrator |
| 1996 | The West (serie) | Self - Narrator |
| 1996 | Terminal Justice | Deacon Vivyan |
| 1996 | Seduced by Madness: The Diane Borchardt Story | Ruben Borchardt |
| 1996 | Seduced by Madness (serie) | Ruben Borchardt |
| 1996 | Escondido en la memoria | Don Bresler |
| 1995 | That Eye, the Sky | Henry Warburton |
| 1995 | The First 100 Years: A Celebration of American Movies | Narrator |
| 1995 | Buffalo Girls | Buffalo Bill Cody |
| 1994 | Breach of Conduct | Col. Andrew Case |
| 1993 | Kika | Nicholas Pierce |
| 1992 | Earth and the American Dream | Reader (voice) |
| 1992 | Lunas de hiel | Oscar |
| 1991 | Keeper of the City | Frank Nordhall |
| 1991 | Living a Lie | Matt |
| 1991 | Secretos de familia | Edward Warren |
| 1991 | El arte de matar | Peter Mandrake |
| 1991 | A Seduction in Travis County | Frank Maguire |
| 1990 | Waldo Salt: A Screenwriter's Journey | Narrator (voice) |
| 1990 | Poison in the Rockies | Narrator (voice) |
| 1989 | Unconquered | Richmond Flowers Sr. |
| 1988 | Baja Oklahoma | Slick Henderson |
| 1987 | Echoes in the Darkness (serie) | William Bradfield Jr. |
| 1987 | Ecos en la oscuridad | William Bradfield Jr. |
| 1987 | Un hombre enamorado | Steve Elliott |
| 1987 | Sworn to Silence | Sam Fischetti |
| 1987 | Increíble suerte | Michael Sanders |
| 1987 | Stacking | The Photographer |
| 1986 | Child's Cry | Matt Townsend |
| 1985 | Blue Yonder, viaje al pasado | Max Knickerbocker |
| 1985 | Al filo de la sospecha | Thomas Krasny |
| 1985 | Jack Kerouac: King of the Beats | Narrator |
| 1985 | La leyenda de Billie Jean | Lt. Larry Ringwald |
| 1984 | Scorned and Swindled | Anthony Ristelli |
| 1984 | Los rompecorazones | Blue |
| 1984 | Best Kept Secrets | Frank Mitchell |
| 1983 | Slayground | Stone |
| 1983 | The Four Corners: A National Sacrifice Area? | Narrator (voice) |
| 1983 | Los mejores años de mi vida | Norton Baskin |
| 1983 | El beso de un extraño | Stanley, the Director |
| 1982 | The UFO Experience | — |
| 1982 | Especies asesinas | Steele |
| 1982 | Timerider: El jinete del tiempo | Porter Reese |
| 1982 | E.T. el extraterrestre | Keys |
| 1982 | Breach of Contract | — |
| 1981 | Isabel's Choice | Wynn Thomas |
| 1981 | People vs. Jean Harris | George Bolen |
| 1980 | Tell Me a Riddle | Young David |
| 1967 | The Hippie Temptation | Digger |
