The new series begins with the candidates in Cape Town, South Africa.
A woman tries to solve the mystery of her missing friend before dementia erases the clues.
Orphan Lyra's world is changed forever by her long-absent uncle's return from the north.
DCI Hicks and DI Renko stumble on a lethal secret that will bind them together for life.
Antarctica - a land of survivors enduring the most hostile conditions on earth.
Agnes attempts to mend the rift between her son and his long-term girlfriend.