| David Duchovny | Fox Mulder |
| Gillian Anderson | Dana Scully |
| Mitch Pileggi | Walter Skinner |
| Darin Morgan | Flukeman |
| Matthew Bennett | First Workman |
| Freddy Andreiuci | Det. Norman |
| Don MacKay | Charlie |
| Marc Baur | Agt. Brisentine
(as Marc Bauer) |
| Gabrielle Rose | Dr. Zenzola |
| Ron Sauvé | Foreman
(as Ron Sauve) |
| Dmitri S. Boudrine | Russian Engineer
(as Dmitri Boudrine) |
| Raoul Ganeev | Dmitri
(as Raoul Ganee) |
| William MacDonald | Federal Marshall |
| Benjamin Glenday | Russian Sailor #2
(uncredited) |
| Hrothgar Mathews | Man on Phone
(uncredited) |
| Steven Williams | Mr. X
(voice) (uncredited) |