
| Title | Year | Status | Character |
|---|
| Bob Hope Presents the Chrysler Theatre | 1963 | TV Series | Frank Mancini |
| East Side/West Side | 1963 | TV Series | Chuck Severson |
| Route 66 | 1962-1963 | TV Series | Whit Spencer / Perry Hall |
| The Untouchables | 1962 | TV Series | Vince Dastille |
| Alcoa Premiere | 1962 | TV Series | Marc Malatesta |
| Naked City | 1961-1962 | TV Series | Dr. Rutland Dutton Detective Dutton |
| Murder, Inc. | 1960 | | Panto (uncredited) |
| Startime | 1960 | TV Series | Repairman |
| Armstrong Circle Theatre | 1959 | TV Series | |
| New York Confidential | 1959 | TV Series | Ernie |
| Decoy | 1958 | TV Series | Sergeant |
| The United States Steel Hour | 1957 | TV Series | Jacques |
| Robert Montgomery Presents | 1955-1957 | TV Series | Tony |
| Kraft Theatre | 1956-1957 | TV Series | |
| Guiding Light | 1952 | TV Series | Joe Turino (1959-1960) |
| Suspense | 1952 | TV Series | Townsman |
| Studio One in Hollywood | 1952 | TV Series | DOG Company Soldier |
| Lost Dream | 2009 | | Emil |
| For Heaven's Sake | 2008 | | Donald Meeks |
| CSI: Crime Scene Investigation | 2008 | TV Series | Grissley Geezer |
| Christmas at Cadillac Jack's | 2007 | TV Movie | Joe Jenkins |
| The Legend of God's Gun | 2007 | | Narrator |
| The Dukes | 2007 | | Giovanni Zorro |
| The Showdown | 2006 | Short | The Announcer |
| The Bold and the Beautiful | 1996-2005 | TV Series | Jonathan Young |
| Cold Case | 2004 | TV Series | Nelson |
| The Guardian | 2003 | TV Series | Ralph Longo |
| The Glow | 2002 | TV Movie | Ben Goodstein |
| The Division | 2002 | TV Series | Judge Miles King |
| The Practice | 1998-2001 | TV Series | Judge Joseph Camp |
| That's Life | 2000-2001 | TV Series | Joe |
| Star Trek: Voyager | 2001 | TV Series | Federation Arbitrator |
| The Apostle Paul: The Man Who Turned the World Upside Down | 2001 | TV Movie | St. Paul (voice, uncredited) |
| Biography | 2001 | TV Series documentary | Host |
| Who Is This Jesus? | 2000 | TV Movie | Narrator |
| Grizzly Adams and the Legend of Dark Mountain | 1999 | | Professor Hunnicut |
| Good vs Evil | 1999 | TV Series | Dr. Townsend |
| Melrose Place | 1999 | TV Series | Barry Denott |
| The Great Builders of Egypt | 1999 | TV Movie | Narrator |
| Early Edition | 1999 | TV Series | MacGruder |
| The Right Way | 1998 | | |
| L.A. Heat | 1997 | TV Series | John Guidell |
| Spider-Man | 1994-1997 | TV Series | Dr. Curt Connors Lizard |
| Dust | 1997 | | Mayor Grites |
| Touched by an Angel | 1997 | TV Series | Clive Hathaway |
| James Dean: Live Fast, Die Young | 1997 | | Winton Dean |
| Pacific Blue | 1996-1997 | TV Series | Mr. Tataglia Joseph Tataglia |
| Road Rovers | 1996-1997 | TV Series | The Master Prof. William F. Shepherd |
| The Glass Cage | 1996 | | LeBeque |
| Charlie Grace | 1996 | TV Series | |
| Walker, Texas Ranger | 1996 | TV Series | Victor DeMarco |
| Hologram Man | 1995 | Video | Dr. Stern |
| Spider-Man Cartoon Maker | 1995 | Video Game | Dr. Curt Connors (voice) |
| Too Bad About Jack | 1994 | | |
| The Rockford Files: I Still Love L.A. | 1994 | TV Movie | Mickey Ryder |
| Renegade | 1994 | TV Series | Henry |
| Save Me | 1994/I | | Barton |
| The Force Within | 1993 | | Police Chief |
| Lois & Clark: The New Adventures of Superman | 1993 | TV Series | George Thompson |
| Batman: The Animated Series | 1993 | TV Series | The Crime Doctor Dr. Matthew Thorne |
| Magic Kid | 1993 | Video | Tony |
| Baywatch | 1993 | TV Series | Al Buchannon |
| Dead Girls Don't Tango | 1992 | | Rheinhardt |
| Pauper's Dream | 1992 | TV Movie | Narrator |
| Space Case | 1992 | | General Maxwell |
| Dark Justice | 1992 | TV Series | Carter Pruitt |
| Terror on Track 9 | 1992 | TV Movie | Chief Mleczko |
| Original Intent | 1992 | Video | Judge May (as Joe Campanella) |
| Memories of Midnight | 1991 | TV Movie | |
| P.S.I. Luv U | 1991 | TV Series | Dellacourt |
| Cafe Romeo | 1991 | | Nino (as Joe Campanella) |
| The Everlasting Adventure Series | 1991 | TV Series | |
| Knots Landing | 1989-1991 | TV Series | Deputy District Attorney / Judge Percal |
| Last Call | 1991 | | Morris Thayer |
| Over My Dead Body | 1990 | TV Series | Leon Geary |
| Club Fed | 1990 | | Vince Hooligan |
| A Show of Force | 1990 | | Walker Ryan |
| Down the Drain | 1990 | | Don Santiago |
| Body Chemistry | 1990 | | Dr. Pritchard |
| No Retreat, No Surrender 3: Blood Brothers | 1990 | | John Alexander |
| Guns of Paradise | 1990 | TV Series | The Horseman |
| Beauty and the Beast | 1988-1989 | TV Series | Dr. Peter Alcott |
| Superboy | 1989 | TV Series | The Phantom |
| 21 Jump Street | 1989 | TV Series | Hunt Samperton |
| Dallas | 1988-1989 | TV Series | Joseph Lombardi Sr. Joseph Lombardi |
| Real to Reel | 1989 | TV Series | Narrator |
| The Game | 1988 | | Schekel |
| Mama's Family | 1987-1988 | TV Series | Mr. Hanson |
| Tales from the Hollywood Hills: Pat Hobby Teamed with Genius | 1987 | TV Movie | Jack Berners |
| Steele Justice | 1987 | | Harry |
| The Golden Girls | 1987 | TV Series | Al Mullins |
| Murder, She Wrote | 1985-1987 | TV Series | George McDaniels / George Knapp |
| The Colbys | 1985-1986 | TV Series | Hutch Corrigan |
| The Love Boat | 1986 | TV Series | Nabil El Masri |
| Crazy Like a Fox | 1986 | TV Series | Bart Simian |
| Hotel | 1985 | TV Series | Russ Turnbull |
| Airwolf | 1984 | TV Series | Gen. Elliot Sandhower |
| This Is Your Life | 1983 | TV Series | Host |
| Veliki transport | 1983 | | |
| Matt Houston | 1983 | TV Series | Nick Harrigan |
| The Comic Book Kids | 1982 | TV Series | Burl Bonnix |
| Quincy M.E. | 1977-1982 | TV Series | Dr. Styer / Lt. Alex Markesian / Charlie Barnes / ... |
| One Day at a Time | 1976-1982 | TV Series | Ed Cooper |
| My Body, My Child | 1982 | TV Movie | Joe Cabrezi |
| Trapper John, M.D. | 1981 | TV Series | Dr. Julian King |
| Jessica Novak | 1981 | TV Series | Larry Baker |
| The Brady Brides | 1981 | TV Series | Inspector Rankin |
| Earthbound | 1981 | | Conrad |
| Hangar 18 | 1980 | | Frank Lafferty |
| Vega$ | 1978-1980 | TV Series | Bruno Moretti / Stewy Wilson |
| Defiance | 1980 | | Karenski (as Joe Campanella) |
| The Plutonium Incident | 1980 | TV Movie | Harry Skirvan |
| Meteor | 1979 | | General Easton |
| Greatest Heroes of the Bible | 1978 | TV Series | Pharaoh |
| Pearl | 1978 | TV Mini-Series | Narrator |
| What Really Happened to the Class of '65? | 1978 | TV Series | Racklin |
| Ring of Passion | 1978 | TV Movie | Paul Gallico |
| Fantasy Island | 1978 | TV Series | Brian Faber |
| Mission to Glory: A True Story | 1977 | | |
| Child Abuse | 1976 | TV Movie | Announcer |
| The Rockford Files | 1976 | TV Series | Arnold Bailey |
| Police Woman | 1976 | TV Series | Joseph Carbeau |
| Friday Night Burn | 1976 | TV Movie | Announcer |
| Matt Helm | 1975 | TV Series | Corbett |
| Barbary Coast | 1975 | TV Series | Austin Benedict |
| Sky Heist | 1975 | TV Movie | Captain Monty Ballard |
| Journey from Darkness | 1975 | TV Movie | Dr. Schroeder |
| Khan! | 1975 | TV Series | |
| Medical Center | 1973-1975 | TV Series | Colson / Duncan |
| Ironside | 1969-1975 | TV Series | Judge John Fredericks / Curtis Whitney / Harry Peters / ... |
| The People's Lawyer | 1975 | TV Movie | Announcer |
| McCloud | 1974 | TV Series | Victor Rhigas |
| Child Under a Leaf | 1974 | | Gerald |
| Hit Lady | 1974 | TV Movie | Jeffrey Baine |
| Terror on the 40th Floor | 1974 | TV Movie | Howard Foster |
| Petrocelli | 1974 | TV Series | Arthur Holbrook |
| Police Story | 1974 | TV Series | Vitale |
| Unwed Father | 1974 | TV Movie | Scott Simmons |
| Skyway to Death | 1974 | TV Movie | Bob Parsons |
| The Magician | 1974 | TV Series | Frank Mitchell |
| Tenafly | 1974 | TV Series | Dr. Poston |
| The ABC Afternoon Playbreak | 1973 | TV Series | |
| The President's Plane Is Missing | 1973 | TV Movie | Col. Doug Henderson |
| The Rookies | 1973 | TV Series | Joe Mannley |
| Drive Hard, Drive Fast | 1973 | TV Movie | Eric Bradley |
| Assignment: Vienna | 1973 | TV Series | Frank Cort |
| Honor Thy Father | 1973 | TV Movie | Narrator (voice) |
| You'll Never See Me Again | 1973 | TV Movie | Lt. John Stillman (as Joe Campanella) |
| Mary Tyler Moore | 1973 | TV Series | Tom Vernon |
| Gunsmoke | 1968-1972 | TV Series | Jack Norcross / Amos McKee |
| Mannix | 1967-1972 | TV Series | Lew Wickersham / Dr. Graham Aspinall |
| The F.B.I. | 1966-1972 | TV Series | Ken Meade / John Anthony Harris / Fritz Moline |
| Ben | 1972 | | Cliff Kirtland |
| Silent Running | 1972 | | Neal - Berkshire' Captain (voice, uncredited) |
| Owen Marshall, Counselor at Law | 1971-1972 | TV Series | Alan Hamilton / Dr. Eric Gibson |
| The Bold Ones: The Lawyers | 1969-1972 | TV Series | Brian Darrell |
| The Sixth Sense | 1972 | TV Series | Paul Crowley |
| And Then They Forgot God | 1971 | TV Movie | |
| Marcus Welby, M.D. | 1970-1971 | TV Series | Howard Garsen / Ignacio Ladera / Leo Maslow |
| Murder Once Removed | 1971 | TV Movie | Lt. Phil Proctor |
| Night Gallery | 1970-1971 | TV Series | Father (segment "Miss Lovecraft Sent Me") / Simms (segment "The Nature of the Enemy") |
| Alias Smith and Jones | 1971 | TV Series | Jake Carlson |
| The Name of the Game | 1968-1970 | TV Series | Ben Fisher / Charles Thorndyke |
| A Clear and Present Danger | 1970 | TV Movie | Jordan Boyle |
| Bracken's World | 1970 | TV Series | Sampson Wilkes |
| Paris 7000 | 1970 | TV Series | |
| Lancer | 1969 | TV Series | Douglas Blessing |
| Insight | 1967-1969 | TV Series | Mike / Irwin / Deliverer / ... |
| The Doris Day Show | 1969 | TV Series | Roger Flanders |
| Any Second Now | 1969 | TV Movie | Doctor Raul Valdez |
| The Virginian | 1963-1968 | TV Series | Walker / Corbett / Pedro Lopez |
| Mission: Impossible | 1967-1968 | TV Series | Captain Miklos Cherno / Dr. Helmut Cherlotov |
| The Fugitive | 1964-1967 | TV Series | Capt. Ralph Lee / Deputy Harry Banner / Jesse Stransel / ... |
| The St. Valentine's Day Massacre | 1967 | | Albert Wienshank |
| Captain Nice | 1967 | TV Series | Kincade |
| The Invaders | 1967 | TV Series | Father Joe Corelli |
| The Wild Wild West | 1967 | TV Series | Talamantes |
| The Big Valley | 1966-1967 | TV Series | Spider Martinson / Francisco De Navarre |
| Run for Your Life | 1967 | TV Series | Ward Cooper |
| The Road West | 1966 | TV Series | Tom Burrus |
| 12 O'Clock High | 1966 | TV Series | Father Roman |
| Shane | 1966 | TV Series | Barney Lucas |
| Days of Our Lives | 1965 | TV Series | Harper Deveraux (1987-1988, 1990-1992) |
| The Doctors and the Nurses | 1962-1965 | TV Series | Dr. Ted Steffen / Ted Steffen / Steffen / ... |
| For the People | 1965 | TV Series | Dr. Ted Steffen |
| The Young Lovers | 1964 | | Prof. Reese |
| Death at the Stock Car Races | 1964 | TV Movie | Driver |
| Suspense | 1964 | TV Series | A driver |
| Combat! | 1963-1964 | TV Series | Lt. Douglas / D'Amato |
| The Lieutenant | 1964 | TV Series | Major Jason Clark |
| The Eleventh Hour | 1964 | TV Series | Pete Ceballos |
| Espionage | 1964 | TV Series | Ben Ashman |
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