Threshold: Odcinki
Sezon 1
| # | Tytuł odcinka | Premiera |
|---|---|---|
| 1 | Trees Made of Glass (1) | 16.09.2005 |
| 2 | Trees Made of Glass (2) | 16.09.2005 |
| 3 | Blood of the Children | 23.09.2005 |
| 4 | The Burning | 30.09.2005 |
| 5 | Shock | 7.10.2005 |
| 6 | Pulse | 14.10.2005 |
| 7 | The Order | 21.10.2005 |
| 8 | Revelations | 4.11.2005 |
| 9 | Progeny | 22.11.2005 |
| 10 | The Crossing | 11.01.2006 |
| 11 | Outbreak | 18.01.2006 |
| 12 | Vigilante | 25.01.2006 |
| 13 | Alienville | 1.02.2006 |