| Series
|
Role
|
Episode
|
Airdate
|
| The Twilight Zone |
Alec |
1x20B - Developing |
April 30, 2003
|
| Stargate SG-1 |
Lt. Marks |
9x01 - Avalon (1) |
July 15, 2005
|
| Stargate SG-1 |
Lt. Marks |
9x02 - Avalon (2) |
July 22, 2005
|
| Stargate SG-1 |
Lt. Marks |
9x06 - Beachhead |
August 19, 2005
|
| Stargate SG-1 |
Lt. Marks |
9x07 - Ex Deus Machina |
August 26, 2005
|
| Stargate SG-1 |
Captain Marks |
9x15 - Ethon |
February 3, 2006
|
| Stargate SG-1 |
Captain Marks |
9x16 - Off the Grid |
February 10, 2006
|
| Stargate SG-1 |
Major Marks |
9x20 - Camelot |
March 10, 2006
|
| Stargate SG-1 |
Major Marks |
10x01 - Flesh and Blood |
July 14, 2006
|
| Stargate SG-1 |
Major Marks |
10x07 - Counterstrike |
August 25, 2006
|
| Stargate SG-1 |
Major Marks |
10x09 - Company of Thieves |
September 15, 2006
|
| Stargate SG-1 |
Major Marks |
10x18 - Family Ties |
June 8, 2007
|
| Stargate SG-1 |
Major Marks |
10x20 - Unending |
June 22, 2007
|
| Eureka |
|
2x06 - Noche de Sueños |
August 14, 2007
|
| Stargate Atlantis |
Major Marks |
4x11 - Be All My Sins Remember'd (2) |
January 4, 2008
|
| Supernatural |
Doctor |
3x10 - Dream a Little Dream of Me |
February 7, 2008
|
| Stargate Atlantis |
Major Marks |
5x01 - Search and Rescue (2) |
July 11, 2008
|
| Stargate Atlantis |
Major Marks |
5x10 - First Contact (1) |
September 26, 2008
|
| Stargate Atlantis |
Major Marks |
5x11 - The Lost Tribe (2) |
October 10, 2008
|
| Stargate Atlantis |
Major Marks (Excerpts from "Search and Rescue" & "Be All My Sins Remember'd") |
5x13 - Inquisition |
October 24, 2008
|
| Stargate Atlantis |
Major Marks |
5x20 - Enemy at the Gate |
January 9, 2009
|
| Eureka (2006) |
Doctor |
3x10 - Your Face or Mine |
July 17, 2009
|
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