Mulder and Scully, and a team of scientific redshirts, head to Alaska after a disturbing transmission from a project that has been drilling into a meteorite crater in the Arctic ice in Alaska. When they get there, they discover a strange organism that was found by the original team as well as a dog showing signs of the plague. The team is marooned after their pilot is killed by the parasitic organism.
The isolation and deadly parasitic alien organism spark a little bit of paranoia amongst the castaways, with Mulder being quarantined after a scientist is found dead. The team discovers that two parasites will kill each other, and that another scientist is infected. They're able to save her by introducing another worm into her system. Mulder wants to further explore the parasite, only to discover that the research station has been destroyed.
Felicity Huffman, later of Desperate Housewives fame, appears in this episode as Dr. Nancy DaSilva.
Episode Body Count
Five team members: considering that only a dog greets the agents and scientists when they arrive at the Arctic Ice Core Project, it's safe to assume that the original team has died, including these two who point their guns at each other before committing suicide and a couple of dead bodies seen in the opening.
Bear: nope, not an animal; the inevitable pilot death. Dies after a parasite is removed from his neck.
Denny Murphy: shows up dead in a freezer.
Four dead worms: Two parasitic worms kill each other, leaving the dog and Dr. DaSilva unharmed.
Cumulative Body Count (8/202 episodes, 0/2 movies)
Grand Total: 50
Note: edited to count the worms as aliens. I'm guessing the fact that the research was being done over a meteor crater would be a sign of that.
8 hours ago