Jim and Taylor must find a way to protect the colony from a Pterosaur attack; Elisabeth wonders if a past love played a role in her recruitment; Syke tries to help Josh.

Cast: Jason O'Mara, Shelley Conn, Christine Adams, Allison Miller, Landon Liboiron, Naomi Scott, Rod Hallett, Alana Mansour, Stephen Lang, Simone Kessell, Dean Geyer, Peter Lamb, Nicholas Cooper, Louis Toshio Okada, Mikhael Wilder