| Name | Character | Episodes |
|---|---|---|
| Terry O'Quinn | 9 | |
| D. B. Sweeney | 9 | |
| Scott Bairstow | 9 | |
| Rachel Hayward | 9 | |
| Robert Knepper | 1 | |
| Gillian Anderson | Video Narrator (uncredited) | 1 |
| Lance Henriksen | 1 | |
| Max Martini | 1 | |
| Max Martini | Waters | 1 |
| Samantha Mathis | Sophie Green | 1 |
| Raymond Cruz | 1 | |
| Tobin Bell | 1 | |
| Glenn Morshower | General | 1 |
| Doug Savant | 1 | |
| Mark Rolston | 1 | |
| Sarah-Jane Redmond | 1 | |
| Sarah-Jane Redmond | Inga Fossa | 1 |
| John Pyper-Ferguson | 1 | |
| Douglas Arthurs | Nazi Man | 1 |
| Chris Carter | Himself | 1 |
| Daniel Sackheim | Himself | 1 |
| Frank Spotnitz | Himself | 1 |
| Andy Berman | Freddie The Forger | 1 |