While investigating radio silence at a nearby outpost, Elisabeth, Jim, Malcolm and Taylor discover an outbreak of a mysterious and fatal virus.

Cast: Jason O'Mara, Shelley Conn, Christine Adams, Allison Miller, Landon Liboiron, Naomi Scott, Rod Hallett, Alana Mansour, Stephen Lang, Simone Kessell, Dean Geyer, Damian Walshe-Howling, Damien Garvey, Alex Pinder, Sam Parsonson