Thomas Ryan is an actor, known for The Relic (1997), The Principal (1987) and Diary of a City Priest (2001).
| Movie | The Chemist | Unknown | 2017 |
| Series | Elementary | Unknown | 2012-09-27 |
| Movie | Concerto | Unknown | 2009 |
| Movie | Starting Out in the Evening | Nick | 2007-01-01 |
| Series | Damages | Unknown | 2007-07-24 |
| Series | Hack | Unknown | 2002-09-27 |
| Movie | Skeletons in the Closet | Unknown | 2001 |
| Movie | Diary of a City Priest | Unknown | 2001 |
| Series | 24 | Unknown | 2001-11-06 |
| Series | 18 Wheels of Justice | Unknown | 2000 |
| Movie | Final Rinse | Unknown | 1999 |
| Movie | Catfish in Black Bean Sauce | Unknown | 1999 |
| Series | Law & Order: Special Victims Unit | Unknown | 1999-09-20 |
| Series | Pensacola: Wings of Gold | Unknown | 1998 |
| Series | Dellaventura | Unknown | 1997-09-23 |
| Movie | The Relic | Unknown | 1997 |
| Series | Sirens | Unknown | 1994 |
| Series | Diagnosis Murder | Unknown | 1993-10-29 |
| Series | Lois & Clark: The New Adventures of Superman | Unknown | 1993-09-12 |
| Movie | Sinatra | Unknown | 1992 |
| Movie | Maid for Each Other | Unknown | 1992 |
| Series | Human Target | Unknown | 1992 |
| Series | Picket Fences | Unknown | 1992-09-18 |
| Series | Renegade | Unknown | 1992-09-19 |
| Series | Bodies of Evidence | Unknown | 1992 |
| Series | Melrose Place | Unknown | 1992-07-08 |
| Series | Brooklyn Bridge | Unknown | 1991 |
| Movie | Talent for the Game | Unknown | 1991 |
| Series | Civil Wars | Unknown | 1991-11-20 |
| Movie | Murder by Numbers | Unknown | 1990 |
| Movie | She Said No | Unknown | 1990 |
| Series | Amen | Unknown | 1990 |
| Series | City | Unknown | 1990 |
| Series | Wings | Unknown | 1990-04-19 |
| Series | Lifestories | Unknown | 1990-08-20 |
| Series | Law & Order | Unknown | 1990-09-13 |
| Series | Mancuso, FBI | Unknown | 1990 |
| Series | Life Goes On | Unknown | 1989-09-12 |
| Series | Booker | Unknown | 1989-09-24 |
| Movie | A Little Bit Strange | Unknown | 1989 |
| Movie | A Father's Homecoming | Harry Birstock | 1988-06-19 |
| Movie | Body Count | Lieutenant Chernoff | 1988-06-01 |
| Movie | Fatal Judgement | Unknown | 1988 |
| Series | 21 Jump Street | Unknown | 1988 |
| Movie | In the Mood | Unknown | 1987 |
| Series | The Bronx Zoo | Unknown | 1987-03-19 |
| Movie | The Principal | Robert Darcy | 1987-09-18 |
| Movie | Summer School | Unknown | 1987 |
| Movie | Cameo by Night | Sorry Eddie | 1987-07-12 |
| Series | Fresno | Unknown | 1986 |
| Series | Matlock | Unknown | 1986-09-20 |
| Series | L.A. Law | Unknown | 1986-09-15 |
| Movie | Stark: Mirror Image | Wade Davis | 1986-05-14 |
| Movie | The Eleventh Commandment | Unknown | 1986 |
| Movie | California Girls | Unknown | 1985 |
| Series | The New Mike Hammer | Unknown | 1984-01-26 |
| Series | Murder, She Wrote | Unknown | 1984-09-30 |
| Movie | Flight 90: Disaster on the Potomac | Unknown | 1984-04-01 |
| Movie | Fighting Back | Unknown | 1982-05-21 |
| Series | Cheers | Unknown | 1982-09-30 |
| Series | Three's Company | Unknown | 1982 |
| Series | Dynasty | Unknown | 1981-01-12 |
| Series | Hill Street Blues | Unknown | 1981-01-15 |
| Movie | Wolfen | Unknown | 1981-07-24 |
| Movie | Nocturna | Unknown | 1979 |
| Series | Dallas | Unknown | 1978-04-02 |
| Series | CHiPs | Unknown | 1977-09-15 |