Orphan Lyra's world is changed forever by her long-absent uncle's return from the north.
In the series finale, the top three queens fight it out for the title.
Antarctica - a land of survivors enduring the most hostile conditions on earth.
The impending new arrival has everyone under pressure, with surprising results.
The new series begins with the candidates in Cape Town, South Africa.
Fiona Bruce presents an special election edition of the programme from Sheffield.