In the series finale, the top three queens fight it out for the title.
When Martians land on Earth, Amy and George become separated in their fight for survival.
The impending new arrival has everyone under pressure, with surprising results.
Orphan Lyra's world is changed forever by her long-absent uncle's return from the north.
When Julia meets a younger man her adult children wonder if his intentions are noble.
Antarctica - a land of survivors enduring the most hostile conditions on earth.