Dark Matter

A working-class radio operator on an Arctic expedition who becomes the ship's reluctant investigator into a mysterious presence.

The expedition's Oxford-educated leader, a charismatic golden boy whom Jack grows close to over the course of the voyage.

A public-school geologist and dog-handler on the expedition whose casual cruelty toward the sled dogs unsettles Jack.

One of the five original expedition members, a public-school friend of Gus who treats the Arctic voyage as a lark.

The expedition's glaciologist, another of Gus and Algie's Oxford friends who joins the voyage north.