Parasitic advance guard from outer space strive to kill a physician, the only human who can hear them. Instead the physician believes he's gone insane, because he first heard the aliens right after suffering a concussion in a lab explosion. His wife, the laboratory 's assistant, comforts him, while the lab's geologist is targeted for takeover by the parasites. Written by
Did You Know?
This is the only first season episode based on a literary work (in this case, Louis Charbonneau
's novel of the same title). See more
The exteriors supposedly shot in Tijuana have English street signs. See more