BBC Four HD Thursday

Alice Roberts sets off across Hadrian's Wall to reveal the forgotten story of the Roman Army's secret weapon in Britain - their cavalry

F1 legend Alain Prost, four-time world champion and winner of 51 races, reflects on his career as France's most successful driver in Formula 1 history

Alain Prost describes how, with Niki Lauda in his corner, he overcame challenges on and off the track to claim his first world title

Short film presenting recordings of the journey by train in 1953 and 1983, demonstrating how both locomotive technology and the landscape have evolved over the years

Part two of two. A look at the construction, design and enduring significance of the iconic stone circle and the ancient civilisation that flourished around it

A mute Scottish widow travels to New Zealand for an arranged marriage, and embarks on a passionate affair with a gruff settler. Period drama, starring Holly Hunter

Frank and Emma plan a ball, and she begins to wonder whether she has feelings for him, before Mr Knightley proposes a refreshing day trip to Box Hill

The outing to Box Hill ends in disaster when Emma insults Miss Bates. After being berated by Knightley, she tries to make amends for her behaviour

Alice Roberts sets off across Hadrian's Wall to reveal the forgotten story of the Roman Army's secret weapon in Britain - their cavalry

Part two of two. A look at the construction, design and enduring significance of the iconic stone circle and the ancient civilisation that flourished around it