The Head

Arthur reveals that the body found by the team was that of Sarah Jackson's. Meanwhile, Maggie discloses that Sarah's death was not an accident. She was murdered.

Jolted by the revelation of Sarah's death, Maggie reveals that the killer was looking for something which Maggie found and kept with her.

In the middle of the winter, a small group of scientists in charge of an international base in the Antartica during the long polar nights stops communicating with the outside world.