| — | San Francisco Stories | Narrator/SInger |
| 2024 | The Program | Narrator (voice) |
| — | Kursk: A Submarine in Troubled Waters | Narrator |
| — | National Geographic Special: Secret Cities of the Amazon | |
| — | The Sacramento River of Life | Narrator |
| 2024 | Bad Faith | Narrator (voice) |
| 2023 | Kennedy | Narrator (voice) |
| 2023 | The American Buffalo | Narrator (voice) |
| 2023 | La Californie ! | Self - Actor / Activist |
| 2023 | Against All Enemies | Narrator |
| 2023 | Fields of Gold | Narrator |
| 2022 | Benjamin Franklin | Narrator (voice) |
| 2022 | Moment of Contact | Narrator (voice) |
| 2022 | The U.S. and the Holocaust | Self - Narrator |
| 2022 | A Cloud Never Dies | Narrator (voice) |
| 2022 | Jerry Brown: The Disrupter | Self |
| 2022 | The Weight of a Feather: The Liberty Wildlife Story | Narrator |
| 2022 | The Last Stand | Narrator (voice) |
| 2021 | The Girl Who Believes in Miracles | Sam Donovan |
| 2021 | Hemingway | Narrator (voice) |
| 2021 | The Tent Mender | as Narrator |
| 2021 | Downwinders and the Radioactive West | Narrator (voice) |
| 2021 | Nepal Beyond | Narrator |
| 2021 | Marriner Eccles: Father of the Modern Federal Reserve | Narrator |
| 2021 | Wandering...But Not Lost | Narrator |
| 2021 | The Co-op Wars | Narrator |
| 2020 | The Comey Rule | Robert Mueller |
| 2020 | The Phenomenon | Narrator (voice) |
| 2020 | Helter Skelter: An American Myth | Self - Actor, Diggers Early Core Member |
| 2020 | Sunseed: The Journey | Narrator (voice) |
| 2020 | Almost Thirteen | Narrator |
| 2019 | The Etruscan Smile | Professor |
| 2019 | Country Music | 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 | The Atomic Tree | Narrator |
| 2018 | The Mayo Clinic | Narrator |
| 2018 | Summer of Love | Himself |
| 2018 | The Remarkable Life of John Weld | Narrator |
| 2018 | As If They Were Angels | Narrator |
| 2017 | Spielberg | Self |
| 2017 | 1 Mile To You | Principal Umber |
| 2017 | The Vietnam War | Narrator (voice) |
| 2017 | The Disappearance | Henry Sullivan |
| 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 |
| 2016 | Americana | Ben |
| 2015 | Good Kill | Langley |
| 2015 | La Rançon de la gloire | Crooker |
| 2015 | Girl on the Edge | Hank Taylor |
| 2015 | L'Échappée belle | Le Père |
| 2015 | The Spoils Before Dying | Dizzy the Cat |
| 2015 | No Deposit | Police Chief Williams |
| 2015 | Robert Bly: A Thousand Years of Joy | Himself |
| 2015 | A Coup in Camelot | Narrator (voice) |
| 2014 | Intelligence | Leland Strand |
| 2014 | On a marché sur Bangkok | Burt Lowell |
| 2014 | The Roosevelts: An Intimate History | Narrator (voice) |
| 2014 | The Real History of Science Fiction | Himself |
| 2014 | Angel Azul | Narrator |
| 2014 | Realm of the Ancient Redwoods | Narrator |
| 2013 | The Ghost Army | Narrator (Voice) |
| 2013 | Long Distance Revolutionary: A Journey with Mumia Abu-Jamal | Self |
| 2013 | Paolo Soleri: Beyond Form | Narrator |
| 2012 | Perception | James Alan Pierce |
| 2012 | Hemingway & Gellhorn | Maxwell Perkins |
| 2012 | The Dust Bowl | Peter Coyote |
| 2012 | Valparaiso | Edward G. Drexler |
| 2012 | Rise Above the Mark | Narrator |
| 2012 | Cold War on Ice: Summit Series '72 | Narrator |
| 2012 | Right to Play | Narrator |
| 2012 | Dangerous Waters | Self |
| 2011 | These Amazing Shadows | Self |
| 2011 | Prohibition | Self - Narrator (voice) |
| 2011 | Here | Storyteller |
| 2011 | This Is Not a Movie | |
| 2011 | The Gundown | Thomas Morgan |
| 2011 | Bag It | Self |
| 2011 | Connected: An Autoblogography About Love, Death & Technology | Narrator (voice) |
| 2011 | Last Will | Judge Garner |
| 2011 | I am Fishead | narrator |
| 2011 | Green Fire | Aldo Leopold (voice) |
| 2011 | Oceans in Glass | Narrator |
| 2010 | Blue Bloods | Senator Ted McCreary |
| 2010 | Law and Order Los Angeles | Jerry Hardin |
| 2010 | Great Migrations | |
| 2010 | DiDi Hollywood | Michael McLean |
| 2010 | What If Cannabis Cured Cancer | Narration |
| 2010 | Vampire Forensics | |
| 2010 | Call of Life: Facing the Mass Extinction | Narrator |
| 2009 | FlashForward | Dave Segovia |
| 2009 | The National Parks: America's Best Idea | Narrator |
| 2009 | Nazi Mystery - Twins From Brazil | Narrstor (voice) |
| 2009 | With One Voice | Narrator |
| 2009 | Full Color Football: The History of the American Football League | Himself - Narrator |
| 2009 | Os Mistérios de Lisboa ou What The Tourist Should See | Narrator (voice) |
| 2009 | Torturing Democracy | Narrator |
| 2009 | For the Rights of All: Ending Jim Crow in Alaska | Self - Narrator (voice) |
| 2009 | Huxley on Huxley | Self |
| 2009 | Grand Canyon: A Journey of Wonder | Narrator |
| 2009 | I Know What I Saw | Narrator (voice) |
| 2009 | Climbing Redwood Giants | Self - Narrator (voice) |
| 2008 | Dr. Dolittle: Tail to the Chief | President Sterling |
| 2008 | $5 a Day | Burt Kruger |
| 2008 | All Roads Lead Home | Hock |
| 2008 | Adopt a Sailor | Richard |
| 2008 | Hope & Redemption: The Lena Baker Story | Elliot Arthur |
| 2008 | A Single Woman | Maury Maverick |
| 2008 | The Brain Fitness Program | |
| 2008 | Texas Gold | Narrator |
| 2008 | Illicit: The Dark Trade | Self - Narrator (voice) |
| 2008 | Alaska Far Away | Narrator |
| 2007 | Resurrecting the Champ | Ike Epstein |
| 2007 | Soldiers Of Conscience | Self |
| 2007 | Strange Culture | Self |
| 2007 | Fog City Mavericks | Self - Narrator (voice) |
| 2007 | One Man, One Cow, One Planet | Narrator |
| 2007 | Hippies | Self |
| 2007 | The Sunday Man | The Voice |
| 2006 | Brothers and Sisters | Mark August |
| 2006 | Behind Enemy Lines II: Axis of Evil | President Adair T. Manning |
| 2006 | AKA Tommy Chong | Himself |
| 2006 | The Gospel of Judas | |
| 2006 | The Gospel of Judas | Narrator |
| 2006 | Woody Guthrie: Ain't Got No Home | Narrator (voice) |
| 2005 | Enron: The Smartest Guys in the Room | Narrator |
| 2005 | Return of the Living Dead: Necropolis | Uncle Charles |
| 2005 | Return of the Living Dead: Rave to the Grave | Uncle Charles |
| 2005 | A Little Trip to Heaven | Frank |
| 2005 | Deepwater | Herman Finch |
| 2005 | Commander in Chief | Warren Keaton |
| 2005 | Guns Germs & Steel | Narrator (voice) |
| 2005 | Law & Order: Trial by Jury | Mike LaSalle |
| 2005 | The Inside | Special Agent Virgil "Web" Webster |
| 2005 | Commune | self, Black Bear resident |
| 2005 | The Tribe | Voice |
| 2005 | The War Prayer | Narrator |
| 2004 | Deadwood | General Crook |
| 2004 | The 4400 | Dennis Ryland |
| 2004 | Shadow of Fear | Congressman Henderson |
| 2004 | Le grand rôle | Rudolph Grichenberg |
| 2004 | Carlos Castaneda: Enigma of a Sorcerer | |
| 2004 | Oil on Ice | Narrator |
| 2003 | Navy CIS | Ned Quinn |
| 2003 | Bon voyage | Alex Winckler |
| 2003 | Northfork | Eddie |
| 2003 | The Hebrew Hammer | JJL Chief Bloomenbergensteinenthal |
| 2003 | Out of the Blue | Narrator (voice) |
| 2003 | Phenomenon II | John Ringold |
| 2003 | Written In Blood | John Traveller |
| 2003 | Hollywood's Magical Island: Catalina | Narrator (voice) |
| 2003 | Grizzly Diaries | Narrator (voice) |
| 2003 | Bare Knuckle Filming: The Construction of Northfork | Narrator |
| 2002 | A Walk to Remember | Reverend Sullivan |
| 2002 | Femme Fatale | Watts |
| 2002 | A Time for Dancing | Wyn Michaels |
| 2002 | Purpose | Bernard Elias |
| 2002 | E.T. the Extra-Terrestrial 20th Anniversary Special | Self |
| 2002 | Polanski y los ojos del mal | Himself |
| 2002 | Empty Oceans, Empty Nets | Narrator (voice) |
| 2002 | Founding Brothers | |
| 2001 | I lagens namn: Brottslig synvinkel | Lionel Shill |
| 2001 | The Division | |
| 2001 | Midwives | Stephen Hastings |
| 2001 | Suddenly Naked | Lionel Heathcote |
| 2001 | Jack the Dog | Alfred Stieglitz |
| 2001 | Neighborhoods: The Hidden Cities of San Francisco - The Fillmore | Voice of Urban Renewal (Voice) |
| 2001 | In the Light of Reverence | Narrator (voice) |
| 2001 | The Color of War | Narrator |
| 2000 | Erin Brockovich | Kurt Potter |
| 2000 | The Basket | Martin Conlon |
| 2000 | More Dogs Than Bones | Detective Darren Cody |
| 2000 | Red Letters | Dennis Burke |
| 2000 | The Wednesday Woman | Don Wigulow |
| 2000 | Search for the Submarine I-52 | Narrator |
| 2000 | Founding Fathers | John Hancock (voice) / Thomas Jefferson (voice) |
| 1999 | Stulen lycka | Cullen Chandler |
| 1999 | Independent Lens | |
| 1999 | Execution of Justice | Harvey Milk |
| 1999 | Last Call | Xuave |
| 1999 | The History of Sex | Himself - Narrator |
| 1999 | Emperor of Hemp | Narrator |
| 1999 | Murder on Shadow Mountain | Dennis 'Denny' Traynor |
| 1999 | National Geographic Explorer: The Battle For Midway | Himself - Narrator |
| 1999 | Missing in Tibet | Narrator |
| 1998 | Patch Adams | Bill Davis |
| 1998 | Sphere: Rymdfarkosten | Captain Harold C. Barnes |
| 1998 | Route 9 | Sheriff Dwayne Hogan |
| 1998 | Indiscreet | Detective Roos |
| 1998 | Seeds Of Doubt | |
| 1998 | Two for Texas | Jim Bowie |
| 1998 | Les Diggers De San Francisco | |
| 1998 | Karmapa - Two Ways of Divinity | Narrator, English version (voice) |
| 1998 | Rome: Power & Glory | Narrator |
| 1998 | National Geographic's Storm of the Century | Self - Narrator (voice) |
| 1998 | Avalanche: The White Death | Narrator |
| 1997 | Top of the World | Doc 'The Butcher' |
| 1997 | The Secrets of 007 | Narrator (voice) |
| 1997 | Road Ends | Gene Gere |
| 1997 | Murder in My Mind | Arthur Lefcourt |
| 1997 | Alaska's Great Wilderness Denali: The Living Edens | Narrator |
| 1996 | Unforgettable | Don Bresler |
| 1996 | The West | Self - Narrator |
| 1996 | Terminal Justice | Deacon Vivyan |
| 1996 | The Making of 'E.T. the Extra-Terrestrial' | Self |
| 1996 | Seduced by Madness: The Diane Borchardt Story | Ruben Borchardt |
| 1996 | Dalva | Michael |
| 1996 | Seduced by Madness | Ruben Borchardt |
| 1995 | Moonlight and Valentino | Paul |
| 1995 | Buffalo Girls | Buffalo Bill Cody |
| 1995 | The First 100 Years: A Celebration of American Movies | Narrator |
| 1995 | That Eye, the Sky | Henry Warburton |
| 1995 | The History of Rock 'n' Roll | Self |
| 1995 | American Cinema | Narrator |
| 1994 | Breach of Conduct | Col. Andrew Case |
| 1993 | Kika | Nicholas Pierce |
| 1993 | Fallen Angels | Herman Charn |
| 1992 | Bitter Moon | Oscar |
| 1992 | Earth and the American Dream | Reader (voice) |
| 1991 | Brustna hjärtan | Edward Warren |
| 1991 | A Grande Arte | Peter Mandrake |
| 1991 | Keeper of the City | Frank Nordhall |
| 1991 | Living a Lie | Matt |
| 1991 | A Seduction in Travis County | Frank Maguire |
| 1990 | Waldo Salt: A Screenwriter's Journey | Narrator (voice) |
| 1990 | The Man Inside | Henry Tobel |
| 1990 | Poison in the Rockies | Narrator (voice) |
| 1989 | Simpsons | Peter Coyote (voice) |
| 1989 | Unconquered | Richmond Flowers Sr. |
| 1988 | Heart of Midnight | Sharpe/Larry |
| 1988 | American Experience | Narrator (voice) |
| 1988 | Baja Oklahoma | Slick Henderson |
| 1988 | Collision Course: Labor Management Relations in America | Narrator |
| 1987 | Par i Damer | Michael Sanders |
| 1987 | Un homme amoureux | Steve Elliott |
| 1987 | Ekon i mörkret | William Bradfield Jr. |
| 1987 | Sworn to Silence | Sam Fischetti |
| 1987 | Stacking | The Photographer |
| 1987 | Echoes in the Darkness | William Bradfield Jr. |
| 1986 | Child's Cry | Matt Townsend |
| 1985 | Kniven är enda vittnet | Thomas Krasny |
| 1985 | The Twilight Zone | |
| 1985 | The Legend of Billie Jean | Lt. Larry Ringwald |
| 1985 | Explorer | |
| 1985 | Explorer | Self - Narrator |
| 1985 | Explorer | Himself - Narrator (voice) |
| 1985 | The Blue Yonder | Max Knickerbocker |
| 1985 | Jack Kerouac: King of the Beats | Narrator |
| 1985 | Contrary Warriors: A Film of the Crow Tribe | Narrator (voice) |
| 1984 | Heartbreakers | Blue |
| 1984 | Best Kept Secrets | Frank Mitchell |
| 1984 | Scorned and Swindled | Anthony Ristelli |
| 1983 | The Hitchhiker | Alex Nolan |
| 1983 | Cross Creek | Norton Baskin |
| 1983 | Slayground | Stone |
| 1983 | Strangers Kiss | Stanley, the Director |
| 1983 | The Four Corners: A National Sacrifice Area? | Narrator (voice) |
| 1982 | E.T. the Extra-Terrestrial | Keys |
| 1982 | Timerider: The Adventure of Lyle Swann | Porter Reese |
| 1982 | Världens natur | Narrator (voice) |
| 1982 | Endangered Species | Steele |
| 1982 | Out | Rex |
| 1982 | The UFO Experience | |
| 1982 | Breach of Contract | |
| 1981 | Inkräktarna | Poole |
| 1981 | People vs. Jean Harris | George Bolen |
| 1981 | Isabel's Choice | Wynn Thomas |
| 1980 | Die Laughing | Davis |
| 1980 | Tell Me a Riddle | Young David |
| 1980 | Alcatraz: The Whole Shocking Story | Courtney Taylor |
| 1980 | Alcatraz: The Whole Shocking Story | Courtney Taylor |
| 1967 | The Hippie Temptation | Digger |
| 1953 | Oscarsgalan | Self |
