Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Actor | Thor | 2011 | Townie |
| Writer | Thor | 2011 | |
| Writer | World War Z | 2013 | |
| Writer | Oszukana | 2008 | |
| Writer | Underworld: Przebudzenie | 2012 | |
| Creator | Babylon 5 | ||
| Writer | Ninja zabójca | 2009 | |
| Writer | Babylon 5: Zjazd | 1993 | |
| Writer | Babylon 5: Rzeka dusz | 1998 | |
| Producer | Babylon 5: Rzeka dusz | 1998 | |
| Writer | Babylon 5: Narodziny | 1998 | |
| Producer | Babylon 5: Narodziny | 1998 | |
| Writer | Babylon 5: Trzecia Przestrzeń | 1998 | |
| Producer | Babylon 5: Trzecia Przestrzeń | 1998 | |
| Writer | Babylon 5: Alarm dla Ziemi | 1999 | |
| Producer | Babylon 5: Alarm dla Ziemi | 1999 | |
| Writer | Babylon 5: Legenda Strażników kosmosu | 2002 | |
| Producer | Babylon 5: Legenda Strażników kosmosu | 2002 | |
| Director | Babylon 5: Głosy w mroku | 2007 | |
| Writer | Babylon 5: Głosy w mroku | 2007 | |
| Producer | Babylon 5: Głosy w mroku | 2007 | |
| Writer | Babylon 5: The Road Home | 2023 | |
| Writer | Murder, She Wrote: A Story to Die For | 2000 | |
| Writer | Silver Surfer: Prodigal Son | 2019 |