BBC Four Wednesday

Michael Portillo's railway journey from Canterbury to Skegness reaches Witham in Essex, where he visits the factory of the world's oldest supplier of metal-framed windows

Ben Robinson flies over Hadrian's Wall to reveal a new view of its history, following recent archaeological discoveries about the people who once lived there

The host reveals how the weather is affected by temperature, building his own dust storm and meeting a scientist who creates lightning bolts

Richard Fortey explores the world of fungi, including the story of their evolution, their mysterious life cycles and their value to both the planet and humanity

The maverick detective investigates the murder of a former child genius's parents. Idris Elba stars in the first instalment of the detective drama

Documentary in which a Palestinian farmer records protests against encroaching Israeli settlements and his own son's development over the course of five years

Michael Portillo's railway journey from Canterbury to Skegness reaches Witham in Essex, where he visits the factory of the world's oldest supplier of metal-framed windows

Ben Robinson flies over Hadrian's Wall to reveal a new view of its history, following recent archaeological discoveries about the people who once lived there

The host reveals how the weather is affected by temperature, building his own dust storm and meeting a scientist who creates lightning bolts

Part one of two. Liz Bonnin, Freida Pinto and Jon Gupta explore the hidden wonders of the natural world in India, including the hoolock gibbon, which greets the morning by singing