BBC Four Tuesday

Michael Portillo explores the east of England en route to Lincolnshire, discovering how the Crossrail project is helping to conserve birds and taking a gelato cart to Southend

Ben Robinson flies over the Norfolk Broads where aerial photographs have discovered 945 previously unknown ancient sites, many of which are making historians rethink the area

Fletcher helps cellmate Godber make it through the night, calling on his limitless imagination to while away the hours. Comedy, starring Ronnie Barker and Richard Beckinsale

Jim decides to save money by getting rid of the Department of Education

First episode of the sitcom about the staff of a Scottish airline. Shona receives a surprise visitor and Steve makes plans for his birthday. Starring Alan Cumming and Forbes Masson

Sebastian discovers an embarrassing secret about Captain Duff, while Steve finds himself falling in love again. Comedy, starring Alan Cumming

How the US' reluctance to act after the chemical attack caused Syrian rebels to despair, leaving a vacuum to be filled by the forces of Isis

Part one of two. Jamie Bartlett investigates how technology companies are shaping the future of the world, and the potential negative consequences of the drive towards progress

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

Michael Portillo explores the east of England en route to Lincolnshire, discovering how the Crossrail project is helping to conserve birds and taking a gelato cart to Southend

Ben Robinson flies over the Norfolk Broads where aerial photographs have discovered 945 previously unknown ancient sites, many of which are making historians rethink the area

How the US' reluctance to act after the chemical attack caused Syrian rebels to despair, leaving a vacuum to be filled by the forces of Isis

Part one of two. Jamie Bartlett investigates how technology companies are shaping the future of the world, and the potential negative consequences of the drive towards progress