| Year | Title | Role | Notes |
| 1970 | Neither Are We Enemies | Barabbas | Television film |
| 1973 | Incident at Vichy | Doctor Leduc |
| The ABC Afternoon Playbreak | John Connors | Episode: "The Mask of Love" |
| 1974 | The American Short Story | Parker Adderson | Episode: "Parker Adderson, Philosopher" |
| Kojak | Bert Podis | Episode: "Die Before They Wake" |
| Barnaby Jones | Porter Long | Episode: "Conspiracy of Terror" |
| Melvin Purvis: G-Man | George "Machine Gun" Kelly | Television film |
| The Greatest Gift | Hog Yancy |
| The Missiles of October | Alexander Fomin |
| 1975 | Ironside | Sam North | Episode: "A Matter of Life of Death" |
| The Trial of Chaplain Jensen | Lieutenant Kastner | Television film |
| Little House on the Prairie | John Stewart | Episode: "Child of Pain" |
| Caribe | Peter Brady | Episode: "The Assassin" |
| Baretta | Detective Grissom | Episode: "The Glory Game" |
| The Kansas City Massacre | John Lazia | Television film |
| S.W.A.T. | Paul Julian | Episode: "Vigilante" |
| Police Woman | Benny Hummel | Episode: "The Hit" |
| 1976 | Dynasty | John Blackwood | Television film |
| Insight | Bradley Knight | Episode: "His Feet Don't Stink" |
| Most Wanted | Billy Wilcox | Episode: "The Skykiller" |
| Victory at Entebbe | General Dan Shomron | Television film |
| 1977 | Wonder Woman | Mark Bremer | Episode: "Wonder Woman in Hollywood" |
| 1978 | When Every Day Was the Fourth of July | Prosecutor Joseph T. Antonelli | Television film |
| 1978–1979 | How the West Was Won | Deek Peasley | 6 episodes |
| 1979–1981 | Meeting of Minds | Leonardo da Vinci/William Shakespeare | 4 episodes |
| 1984–1985 | As the World Turns | Michael Christopher | |
| 1985 | Robert Kennedy and His Times | Senator Joseph McCarthy | Episode: "#1.1" |
| 1986 | Cagney & Lacey | Ross O'Brien | Episode: "Revenge" |
| 1989 | Tailspin: Behind the Korean Airliner Tragedy | Gen. Tyson | Television film |
| 1990 | Daughter of the Streets | John Franco |
| 1990–1991 | WIOU | Neal Frazier | 16 episodes |
| 1991 | Face of a Strangers | David | Television film |
| 1992 | The Heart of Justice | Keneally |
| Civil Wars | Nicolo Nicolai | Episode: "Dan Boat House" |
| 1993 | The Last Hit | Wilbur Bryant | Television film |
| Star Trek: Deep Space Nine | Aamin Marritza | Episode: "Duet" |
| 1994, 2008 | Law & Order | Stanley Devon / Edward Manning | Episode S4:E16: "Big Bang" Episode S19:E2: "Challenged" |
| 1995 | Truman | General George C. Marshall | Television film |
| 1996 | Frasier | Jerome Belasco | Episode: "A Word to the Wiseguy" |
| If These Walls Could Talk | Professor Speras | Segment "1974" |
| 1997 | Murphy Brown | The Jackal | Episode: "You Don't Know Jackal" |
| La Femme Nikita | Gregory Kessler / Norris Gaines | Episode: "Gambit" |
| Hostile Waters | Admiral Quinn | Television film |
| 1997–2001 | American Experience | Narrator | Documentary; 2 episodes |
| 1998 | American Masters | Episode: "Leonard Bernstein: Reaching for the Note" |
| 1999 | Vengeance Unlimited | Judge Harold Wabash | Episode: "Judgment" |
| 1999–2002 | Buffy the Vampire Slayer | Quentin Travers | 3 episodes |
| 2000 | The Virginian | Judge Henry | Television film |
| The X-Files | Cardinal O'Fallon | Episode: "Hollywood A.D." |
