Actor
- Spring Break '83 (2008) .... Sargeant Ron
- What Love Is (2007) .... Ken
- Poolhall Junkies (2003) .... Johnny Doyle
- Zigs (2001) .... Sam (as Gregory 'Mars' Martin)
- That Thing You Do! (1996) .... Ernie the Disc Master Engineer
- The Office (1995) .... (1 episode, 1995)
- Clifford (1994) .... Brian (as Gregory 'Mars' Martin)
- Kalifornia (1993) .... Walter Livesy (as Gregory 'Mars' Martin)
- Highway to Hell (1992) .... State Policeman (as Gregory Mars Martin)
- I Know My First Name Is Steven (1989) .... Victor (Age 14) (as Gregory 'Mars' Martin)
- The Children of Times Square (1986) .... Brian (as Gregory 'Mars' Martin)
- What Love Is (2007) ....
- Poolhall Junkies (2003) ....
- Zigs (2001) .... (as Gregory 'Mars' Martin)
- Spring Break '83 (2008) .... producer
- Ballbreakers (2005) .... co-executive producer (unknown episodes)
- Spring Break '83 (2008) ....
- What Love Is (2007) .... writer
- Poolhall Junkies (2003) .... (written by) and
- Zigs (2001) .... writer