| Amber Frey: Witness for the Prosecution | 2005 | Judge | TV Movie |
| School of Life | 2005 | Principal Bass | TV Movie |
| Masters of Horror | 2005 | Steven | TV Show |
| Supernatural | 2005 | Grandpa | TV Show |
| Snakehead Terror | 2004 | Ray Wilkens | TV Movie |
| Jack | 2004 | ER Doctor | TV Movie |
| The 4400 | 2004 | Minister | TV Show |
| Sweet Destiny | 2004 | Dr. Berenstein | Movie |
| Lies Like Truth | 2004 | | Movie |
| Stealing Christmas | 2003 | Bank Manager | TV Movie |
| Dead in a Heartbeat | 2002 | Elderly Gentleman | TV Movie |
| Living with the Dead | 2002 | Old Man | TV Movie |
| Video Voyeur: The Susan Wilson Story | 2002 | Judge Sharp | TV Movie |
| The Dead Zone | 2002 | Dr. Jenson - Age 70 | TV Show |
| Big Shoes to Fill | 2002 | Judge | Short Film |
| 3000 Miles to Graceland | 2001 | Judge Carmody | Movie |
| Speaking of Sex | 2001 | Dr. Fromm | Movie |
| Pasadena | 2001 | Jack Cameron | TV Show |
| Smallville | 2001 | Las Vegas Minister | TV Show |
| The Chris Isaak Show | 2001 | Janitor / Judge | TV Show |
| My 5 Wives | 2000 | Judge Roberts (as Don Mackay) | Movie |
| Best Actress | 2000 | Morty | TV Movie |
| By Dawn's Early Light | 2000 | Mayor | TV Movie |
| Deadlocked | 2000 | Forest | TV Movie |
| Mysterious Ways | 2000 | Shawn Leonard | TV Show |
| Hollywood Off-Ramp | 2000 | | TV Show |
| Heaven's Fire | 1999 | Mr. Lords | TV Movie |
| Silver Wolf | 1999 | Sonny LaFramboise (as Don Mackay) | TV Movie |
| Hope Island | 1999 | Charlie | TV Show |
| Sabrina, the Animated Series | 1999 | Additional Voices | TV Show |
| An Unexpected Life | 1998 | Dr. Randall | TV Movie |
| Circle of Deceit | 1998 | Wexler | TV Movie |
| Cold Squad | 1998 | Divorce Judge | TV Show |
| Nothing Too Good for a Cowboy | 1998 | Judge Ames | TV Show |
| The New Addams Family | 1998 | Max | TV Show |
| Alibi | 1997 | Court Clerk | TV Movie |
| Breaking the Surface: The Greg Louganis Story | 1997 | Father | TV Movie |
| Dad's Week Off | 1997 | Mr. Mendelson | TV Movie |
| Ellen Foster | 1997 | | TV Movie |
| Beyond Belief: Fact or Fiction | 1997 | Harold Plum (segment "The Mystery of Douglas Hibbard") | TV Show |
| Dead Man's Gun | 1997 | Howard Spence | TV Show |
| Honey, I Shrunk the Kids: The TV Show | 1997 | Mr. Schoedsack | TV Show |
| Stargate SG-1 | 1997 | Committee Member #2 | TV Show |
| Maternal Instincts | 1996 | Doctor | TV Movie |
| Abducted: A Father's Love | 1996 | Judge | TV Movie |
| In the Lake of the Woods | 1996 | Speaker | TV Movie |
| Murder at My Door | 1996 | Mr. Emile | TV Movie |
| The Halfback of Notre Dame | 1996 | Father O'Malley | TV Movie |
| The Limbic Region | 1996 | Newspaper Editor | TV Movie |
| Titanic | 1996 | Mr. Dickie | TV Show |
| Millennium | 1996 | Jack Meredith | TV Show |
| Poltergeist: The Legacy | 1996 | Dr. Davis McBride / Dr. Risling | TV Show |
| The Sentinel | 1996 | Bert Gershwin / Stein | TV Show |
| Two | 1996 | Pop Dellar | TV Show |
| Shadow of a Doubt | 1995 | Detective Maguire (as Don Mackay) | TV Movie |
| Sliders | 1995 | Artie / Artie Field | TV Show |
| The Outer Limits | 1995 | Ollie Gibb / Pat Dooley / Dr. Link | TV Show |
| Brothers' Destiny | 1995 | Henry (as Don McKay) | TV Movie |
| Beyond Obsession | 1994 | Judge Mahoney | TV Movie |
| The Man Who Wouldn't Die | 1994 | Henry Graham (as Don Mackay) | TV Movie |
| M.A.N.T.I.S. | 1994 | Senator Campbell | TV Show |
| Viper | 1994 | Dr. Newhouse | TV Show |
| Tears and Laughter: The Joan and Melissa Rivers Story | 1994 | Accountant | TV Movie |
| A Stranger in the Mirror | 1993 | Mike (uncredited) | TV Movie |
| The X-Files | 1993 | Judge / Oates / Charlie / ... | TV Show |
| Stroke | 1993 | Father | Short Film |
| City Boy | 1992 | Clerk (as Don McKay) | TV Movie |
| Bill & Ted's Excellent Adventures | 1992 | Mr. Tupper | TV Show |
| Highlander | 1992 | Stanley | TV Show |
| The Hat Squad | 1992 | Mr. Wolf | TV Show |
| The Heights | 1992 | Belman | TV Show |
| Fatal Memories | 1992 | Judge (as Donald MacKay) | TV Movie |
| Home Movie | 1992 | Charlie Ace | TV Movie |
| Showdown at Williams Creek | 1991 | Jury Foreman | Movie |
| The Commish | 1991 | Phil / Dr. Warton | TV Show |
| From Flores | 1990 | Captain Crabbe (voice, as Don Mackay) | Short Film |
| American Boyfriends | 1989 | Julie's Father (as Don Mackay) | Movie |
| The Trial of the Incredible Hulk | 1989 | Judge (as Don Mackay) | TV Movie |
| Booker | 1989 | Judge | TV Show |
| Bordertown | 1989 | Artemus Boone | TV Show |
| Neon Rider | 1989 | | TV Show |
| Unsub | 1989 | Mr. Compton | TV Show |
| Body of Evidence | 1988 | J.P. | TV Movie |
| The People Across the Lake | 1988 | Real Estate Agent (as Don Mac Kay) | TV Movie |
| Malone | 1987 | Dr. Florian (as Don Mackay) | Movie |
| Stakeout | 1987 | Prison Officer (as Don Mackay) | Movie |
| The Stepfather | 1987 | Joe | Movie |
| Hands of a Stranger | 1987 | Judge Forester | TV Movie |
| 21 Jump Street | 1987 | Kyle Morgan / Sergeant / Desk Officer / ... | TV Show |
| Airwolf | 1987 | Clive Harper | TV Show |
| J.J. Starbuck | 1987 | | TV Show |
| The New Adventures of Beans Baxter | 1987 | Bald Man | TV Show |
| Wiseguy | 1987 | Harvey Sticks | TV Show |
| Nobody's Child | 1986 | Mr. Baldanza | TV Movie |
| Loyalties | 1986 | Mike Sawchuk (as Don Mackay) | Movie |
| Christmas Snow | 1986 | Harry Bannerman | TV Movie |
| Firefighter | 1986 | Cindy's Father | TV Movie |
| That Secret Sunday | 1986 | Frank | TV Movie |
| Blackout | 1985 | Dental Surgeon (as Don Mackay) | TV Movie |
| Going for the Gold: The Bill Johnson Story | 1985 | Mailman / Harry | TV Movie |
| Perry Mason Returns | 1985 | | TV Movie |
| MacGyver | 1985 | Pilot | TV Show |
| Stingray | 1985 | Wally | TV Show |
| Brotherly Love | 1985 | Ernest Deems | TV Movie |
| Danger Bay | 1984 | Chief | TV Show |
| Secrets of a Married Man | 1984 | Doctor | TV Movie |
| Jane Doe | 1983 | Desk Sergeant (as Don Mackay) | TV Movie |
| The Haunting Passion | 1983 | | TV Movie |
| Dead Wrong | 1983 | Inspector Mullins | Movie |
| First Blood | 1982 | Preston (as Don Mackay) | Movie |
| The Grey Fox | 1982 | Al Sims (as Don Mackay) | Movie |
| The Minikins | 1981 | Shopkeeper | TV Show |
| Amber Waves | 1980 | | TV Movie |
| The Plutonium Incident | 1980 | Head of Personnel | TV Movie |
| Huckleberry Finn and His Friends | 1979 | Silas | TV Show |
| Ski Lift to Death | 1978 | Promoter (as Donald Mackay) | TV Movie |
| Witch of Westminster Crossing | 1978 | | TV Movie |
| The Beachcombers | 1972 | Judge | TV Show |
| The Magical World of Disney | 1954 | Mr. Frampton / Dr. Fitzroy | TV Show |
