BBC Four HD Wednesday

Michael Portillo continues his journey through East Anglia, where he discovers the Essex origins of the BBC and joins the Women's Land Army to pick damsons at Tiptree

Julia Bradbury retraces the steps taken by Roman legions on the summit of High Street in the Lake District's fells, and visits the valley of Mardale

Life in the tropical Atlantic, where everything from dolphins to jellyfish thrive in the warm waters - until extreme heat in Africa unleashes deadly hurricanes

Dr Sam Willis examines how the Victorians tried to tackle high mortality rates at sea and looks at the origins of the women and children first protocol

Nicola tells Philip a film company wants to adapt his book, but he remains suspicious of her motives and continues to be haunted by the traumatic events of his childhood

Marlow sees the mysterious men from the detective story on the ward, while another session with Dr Gibbon leads him to recall a disturbing incident with his mother

Philip's various fictions and memories merge together - much to the anger of the characters, who seek retribution on their creator

Michael Portillo continues his journey through East Anglia, where he discovers the Essex origins of the BBC and joins the Women's Land Army to pick damsons at Tiptree

Julia Bradbury retraces the steps taken by Roman legions on the summit of High Street in the Lake District's fells, and visits the valley of Mardale

Life in the tropical Atlantic, where everything from dolphins to jellyfish thrive in the warm waters - until extreme heat in Africa unleashes deadly hurricanes