| Series
|
Role
|
Episode
|
Airdate
|
Sledge Hammer!
(credited as Mark Ralston) |
Braddock |
1x09 - Magnum Farce |
November 22, 1986
|
| Matlock |
Keith Morrisey |
3x19 - The Blues Singer |
May 9, 1989
|
| Jake and the Fatman |
|
4x08 - Night and Day |
November 14, 1990
|
| In the Heat of the Night |
Kevin Riley |
5x02 - Baby for Sale |
October 8, 1991
|
| Murder, She Wrote |
Finn Dawley |
8x17 - To the Last Will I Grapple with Thee |
March 15, 1992
|
| Murder, She Wrote |
Liam Gillen |
9x04 - The Wind Around the Tower |
November 1, 1992
|
| Murder, She Wrote |
Sgt. Terence Boyle |
10x07 - A Killing in Cork |
November 21, 1993
|
| Star Trek: The Next Generation |
Lt. Walter Pierce |
7x18 - Eye of the Beholder |
February 28, 1994
|
| Babylon 5 |
Karl Mueller |
1x21 - The Quality of Mercy |
August 17, 1994
|
| Diagnosis Murder |
Vinnie Bartell |
2x07 - You Can Call Me Johnson |
October 28, 1994
|
| The X-Files |
Richard Odin |
2x10 - Red Museum |
December 9, 1994
|
| ER |
Off. Thomas |
1x18 - The Birthday Party |
February 16, 1995
|
| Lois & Clark: The New Adventures of Superman |
Gregor |
2x16 - Lucky Leon |
March 12, 1995
|
| Murder, She Wrote |
Sgt. Terence Boyle |
11x20 - Another Killing in Cork |
May 7, 1995
|
| Sisters |
Col. Haystings |
6x20 - Leap Before You Look |
March 16, 1996
|
| NYPD Blue |
Leon Broadus |
3x19 - Auntie Maimed |
April 30, 1996
|
| JAG |
Lt. Cmdr. Lowry |
1x19 - Recovery |
May 1, 1996
|
| Walker, Texas Ranger |
Jake Prentice |
5x08 - A Silent Cry |
November 9, 1996
|
| Nash Bridges |
|
3x13 - Crossfire |
January 9, 1998
|
| Profiler |
Donald Lucas |
3x14 - Otis, California |
February 20, 1999
|
| The X-Files |
Bud LaPierre |
7x10 - Sein und Zeit (1) |
February 6, 2000
|
| Angel |
Boone |
2x12 - Blood Money |
January 23, 2001
|
| Dark Angel |
Herman Colberg |
1x16 - Haven |
March 27, 2001
|
| Alias |
Seth Lambert |
1x03 - Parity |
October 14, 2001
|
| Touched by an Angel |
Delroy Gibbons |
8x06 - Famous Last Words |
November 3, 2001
|
| NYPD Blue |
Carl Bowen |
9x12 - Oh, Mama |
February 19, 2002
|
| Curb Your Enthusiasm |
Contractor |
3x07 - The Corpse-Sniffing Dog |
October 27, 2002
|
| The Shield |
Gordie Liman |
2x01 - The Quick Fix |
January 7, 2003
|
| The Shield |
Gordie Liman |
2x02 - Dead Soldiers |
January 14, 2003
|
| The Shield |
Gordie Liman |
2x03 - Partners |
January 21, 2003
|
| The Shield |
Gordie Liman |
2x06 - Homewrecker |
February 11, 2003
|
| The Shield |
Gordie Liman |
2x11 - Inferno |
March 18, 2003
|
| 24 |
Bruce Foxton |
3x22 - Day 3: 10:00AM - 11:00AM |
May 11, 2004
|
| 24 |
Bruce Foxton |
3x23 - Day 3: 11:00AM - 12:00PM |
May 18, 2004
|
| CSI: NY |
Inspector Bill Markoni |
1x18 - The Dove Commission |
March 23, 2005
|
| Criminal Minds |
Sheriff Hall |
1x11 - Blood Hungry |
December 14, 2005
|
| CSI: Miami |
FBI Agent Glenn Cole |
4x25 - One of Our Own |
May 22, 2006
|
| CSI: Miami |
FBI Agent Glenn Cole |
5x03 - Death Pool 100 |
October 2, 2006
|
| The Closer |
Father Jack |
3x02 - Grave Doubts |
June 25, 2007
|
| Cold Case |
Ari Gordon |
5x01 - Thrill Kill |
September 23, 2007
|
| Cold Case |
Ari Gordon |
5x02 - That Woman |
September 30, 2007
|
| Reaper |
Arthur Ferry |
1x02 - Charged |
October 2, 2007
|
| Cold Case |
Ari Gordon |
5x05 - Thick as Thieves |
October 21, 2007
|
| Cold Case |
Ari Gordon |
5x09 - Boy Crazy |
November 18, 2007
|
| CSI: Miami |
FBI Agent Glenn Cole |
6x12 - Miami Confidential |
December 17, 2007
|
| Supernatural |
Alastair |
4x09 - I Know What You Did Last Summer |
November 13, 2008
|
| Supernatural |
Alastair |
4x10 - Heaven and Hell |
November 20, 2008
|
| The Mentalist |
Det. Dale Blakely |
1x08 - The Thin Red Line |
November 25, 2008
|
| CSI |
Sheriff |
9x10 - One to Go (2) |
January 15, 2009
|
| The Closer |
Father Jack |
5x05 - Half Load |
July 6, 2009
|
| NCIS: Los Angeles |
Marine Sergeant Jerrold "Pallet" Mulhearn |
1x06 - Keepin' It Real |
November 3, 2009
|
| NCIS |
George Westcott |
10x06 - Shell Shock (1) |
November 13, 2012
|
| NCIS |
George Westcott |
10x07 - Shell Shock (2) |
November 20, 2012
|
| Castle |
Kurt Van Zant |
7x22 - Dead from New York |
May 4, 2015
|
