| American Gun | 2005 | Jerry (as Michael J. Shannon) | Movie |
| Boston Legal | 2004 | Avery Wilson | TV Show |
| Beginner's Luck | 2001 | Old luvvie | Movie |
| Crossing Jordan | 2001 | Philip Corday | TV Show |
| Doctor Who: The Monthly Adventures | 1999 | Dr. Hugo Macht | TV Show |
| Only Love | 1998 | Dr. Duncan (as Michael J. Shannon) | TV Movie |
| CI5: The New Professionals | 1998 | Stryker | TV Show |
| 30 Years to Life | 1998 | Graham (as Michael J. Shannon) | TV Movie |
| 13th Rider | 1997 | Robert | TV Show |
| Balto | 1995 | Inventor (uncredited) | Movie |
| Detonator II: Night Watch | 1995 | Martin Schraeder (as Michael J. Shannon) | TV Movie |
| The Affair | 1995 | Capt. Ford | TV Movie |
| JAG | 1995 | Maj. Gen. Richard Plesac / Major General Richard Plesac | TV Show |
| The Boss | 1995 | Milton Macrae | TV Show |
| Paparazzo | 1995 | Denis Prince | Movie |
| Royce | 1994 | Senator Scanlon (as Michael J. Shannon) | TV Movie |
| Scarlett | 1994 | Maxwell | TV Show |
| Space Precinct | 1994 | Dr. Henry Jansen | TV Show |
| Fatherland | 1994 | US Ambassador (as Michael J. Shannon) | TV Movie |
| Prime Suspect 3 | 1993 | Jake Hunter | TV Show |
| Goodnight Sweetheart | 1993 | Ed Murrow | TV Show |
| Under the Hammer | 1993 | Charles B. Whiteside | TV Show |
| Maigret | 1992 | Oswald Clark | TV Show |
| The Big Battalions | 1992 | David | TV Show |
| Merlin of the Crystal Cave | 1991 | Blackbeard | TV Show |
| In Suspicious Circumstances | 1991 | Philip Yale Drew | TV Show |
| Josie | 1991 | | TV Show |
| Murder by Moonlight | 1989 | Ivanov (as Michael J .Shannon) | TV Movie |
| Pride and Extreme Prejudice | 1989 | Chapinski (as Michael J. Shannon) | TV Movie |
| Tailspin: Behind the Korean Airliner Tragedy | 1989 | Grover | TV Movie |
| Poirot | 1989 | Mr Baker Wood | TV Show |
| Anything More Would Be Greedy | 1989 | Toby Dehring | TV Show |
| Red Dwarf | 1988 | John F. Kennedy | TV Show |
| Out of the Shadows | 1988 | Frank Osbourne | TV Movie |
| Poor Little Rich Girl: The Barbara Hutton Story | 1987 | Morley Kennerly (parts 1,4-6) (as Michael J. Shannon) | TV Movie |
| The Two Mrs. Grenvilles | 1987 | Jack Fisher | TV Show |
| The Ladies | 1987 | | TV Movie |
| Little Shop of Horrors | 1986 | Television Reporter (as Michael J. Shannon) | Movie |
| The Ted Kennedy Jr. Story | 1986 | Senator John Tunney | TV Movie |
| A Very Peculiar Practice | 1986 | Vice-Chancellor Jack Daniels | TV Show |
| Boon | 1986 | Peter Shelley | TV Show |
| Death of an Angel | 1985 | Bishop Holmes | Movie |
| Behind Enemy Lines | 1985 | Robert Harwell | TV Movie |
| Dempsey and Makepeace | 1985 | Conrad | TV Show |
| Screen One | 1985 | Admiral | TV Show |
| Screen Two | 1985 | Neil Turkle | TV Show |
| Sheena | 1984 | Phillip Ames | Movie |
| Call to Glory | 1984 | Malcolm Sloane | TV Show |
| Partners in Crime | 1984 | Hamilton Frye | TV Show |
| Philip Marlowe, Private Eye | 1983 | Dr. Sutro | TV Show |
| Scarecrow and Mrs. King | 1983 | Dr. Scardelli | TV Show |
| The A-Team | 1983 | Randy Anderson | TV Show |
| Shades of Darkness | 1983 | Edward Boyne | TV Show |
| Perfect Shadows | 1983 | Chuck Miller (as Michael J. Shannon) | TV Movie |
| Making Love | 1982 | Marty | Movie |
| Remington Steele | 1982 | Frank Bigelow | TV Show |
| We'll Meet Again | 1982 | Major James Kiley / Maj. Jim Kiley | TV Show |
| Simon & Simon | 1981 | Dr. Claude Dreyer | TV Show |
| Riker | 1981 | Brice Landis | TV Show |
| Superman II | 1980 | President's Aide (as Michael J. Shannon) | Movie |
| Never Never Land | 1980 | Peter | Movie |
| The Best Place to Be | 1979 | Patrick Callahan | TV Movie |
| Lillie | 1978 | Freddie Gebhard | TV Show |
| The Paper Chase | 1978 | Morrison | TV Show |
| Cops and Robin | 1978 | John Haven | TV Movie |
| Eight Is Enough | 1977 | Ben Catron | TV Show |
| Lou Grant | 1977 | Mac McIvor | TV Show |
| Target | 1977 | Bradley | TV Show |
| Arthur Hailey's the Moneychangers | 1976 | Lew Endicott | TV Show |
| Charlie's Angels | 1976 | Tim Stone | TV Show |
| Future Cop | 1976 | Officer Haven / Haven | TV Show |
| Rock Follies | 1976 | Carl 'Tubes' Benson | TV Show |
| The Feather and Father Gang | 1976 | Richard | TV Show |
| That Lucky Touch | 1975 | Lt. Davis (as Michael J. Shannon) | Movie |
| Wonder Woman | 1975 | Cameron / Lt. Stonehouse | TV Show |
| The Hanged Man | 1975 | Milton Webber | TV Show |
| Shoot It Black, Shoot It Blue | 1974 | Purcell | Movie |
| Nouvelles de Henry James | 1974 | James Sinclair | TV Show |
| All My Children | 1970 | Dr. Bill Hoffman (1972) | TV Show |
| Search for Tomorrow | 1951 | Jim McCarren (1971-1972) | TV Show |
