| Small rocks fall from the sky which, when touched, trigger a latent virus that has always existed in humans and begins mutating them into an alien species. Taking advantage of its hive mentality, the aliens are absolutely dedicated to transforming every human on Earth and do so with alarming swiftness. Only a small group of humans remain who have the medical knowledge to devise antibodies to reverse the effects of the virus. |
| Name | Character | Episodes |
|---|---|---|
| Neal McDonough | Randy North | 2 |
| Kim Cattrall | Doctor Sheila Moran | 2 |
| Castulo Guerra | Eugene Ochoa | 2 |
| Michael Warren | Doctor Halan McCoy | 2 |
| Jon Polito | Detective Kemper | 2 |
| Denice Duff | Denice Duff | 2 |
| Luke Perry | Beau Stark | 2 |
| Rebecca Gayheart | Cassy Winslow | 2 |
| Jason Schombing | Detective's assistant | 2 |
| María Celedonio | Andie | 2 |
| Rosanna DeSoto | Nancy Ochoa | 2 |
| Christopher Orr | Pitt Henderson | 2 |
| Louis Crugnali | John Ochoa | 2 |