TV Guide for Today Tuesday 25 in BBC Four

Chris Beardshaw visits inspirational gardens by helicopter. He investigates a couple's extraordinary lawn designs and the wild beauty of the North Pennine hay meadows.

Intimate portrait of Sir John Betjeman, one of the most popular English poets of the 20th century. Featuring contributions from the Prince of Wales and Lord Snowdon.

Richard Miles goes back 2,000 years to explore how archaeology began by trying to prove a biblical truth, a quest that soon got archaeologists into dangerous waters.

Tim Dunn explores St Pancras station in London and its sister hotel, built to show off the might of the Midlands, and learns about Castle Howard station in North Yorkshire.

Chris Beardshaw travels by helicopter to find Britain's most inspirational garden. She goes to South West Ireland, where exotic plants grow outside.

Stately sitcom. DeVere moves his multinational grocery business to the manor and crosses swords with Audrey over a fireplace.

Sitcom. Hyacinth invents the outdoors indoors luxury barbecue - a complicated description for an even more complicated culinary event.

Dan Snow reveals how the Irish saved Britain from cultural oblivion in the Dark Ages. He examines the demise of civilisation in Britain after the Romans left.

Eamonn McCabe traces the emergence of photojournalism in the early 20th century. Contains scenes which some viewers may find disturbing.

Technical developments are enabling us to see the world of plants in ever greater detail, giving us insights into their remarkable abilities to adapt and survive.

Space scientist and lunar fanatic Dr Maggie Aderin-Pocock explores people's intimate relationship with the moon, a familiar presence in the sky that most take for granted.

Chris Beardshaw travels by helicopter to find Britain's most inspirational garden. She goes to South West Ireland, where exotic plants grow outside.

Technical developments are enabling us to see the world of plants in ever greater detail, giving us insights into their remarkable abilities to adapt and survive.

Dan Snow reveals how the Irish saved Britain from cultural oblivion in the Dark Ages. He examines the demise of civilisation in Britain after the Romans left.