BBC Four HD 2026-09-09 Programmes start at 7.00pm. [HD] 2026-09-09 10/10. Tim Dunn sees Swindon's railway village and explores the past of Milan's monumental station. [S,AD] [HD] 2026-09-09 Peripatetic gardener Chris Beardshaw flies to the south west in search of hedges. He visits the gardens of RHS Rosemoor in Devon and Antony House in Cornwall. [S] 2026-09-09 6/8. Stately sitcom. Audrey waits for DeVere to go away before she herself goes on holiday. [S] 2026-09-09 5/7. Sitcom. Hyacinth decides to have a second attempt at finding a small weekend home in the country, but she and Richard have different views on the word 'small'. [S] 2026-09-09 1/7. Popular 1970s sitcom about a middle-class, middle-aged rebel. Why is Reggie referring to his mother-in-law as a hippopotamus? [S] 2026-09-09 2/7. Reggie Perrin needs a month's holiday, but all he gets is an afternoon in a safari park with his wife, daughter, son-in-law and their two 'tiny adults'. [S] 2026-09-09 Documentary detailing the killer wave which struck the coast of the Bristol Channel in 1607. Two scientists are increasingly convinced that the wave was actually a tsunami. [S,AD] 2026-09-09 1/3. A museum in Osaka asks the Mayuyamas for help with artefacts currently hidden away in their archive: an exquisite 800-year-old celadon vase from China and a 16th-century tea bowl. [S] [HD] 2026-09-09 Documentary. Jim Al-Khalili takes a look at how we've created machines that can simulate, augment, and even outperform the human mind - and why this shouldn't spook us. [S,AD] [HD] 2026-09-09 Marcus du Sautoy demystifies the hidden world of algorithms, revealing where these 2,000-year-old problem-solvers came from, how they work and what they have achieved. [S] [HD] 2026-09-09 Peripatetic gardener Chris Beardshaw flies to the south west in search of hedges. He visits the gardens of RHS Rosemoor in Devon and Antony House in Cornwall. [S] 2026-09-09 Documentary detailing the killer wave which struck the coast of the Bristol Channel in 1607. Two scientists are increasingly convinced that the wave was actually a tsunami. [S,AD] 2026-09-09 Documentary. Jim Al-Khalili takes a look at how we've created machines that can simulate, augment, and even outperform the human mind - and why this shouldn't spook us. [S,AD,SL] [HD] 2026-09-09 Programmes start at 7.00pm. [HD] 2026-09-09 2026-09-09 2026-09-09 2026-09-10 Programmes start at 7.00pm. [HD] 2026-09-10 3/6. Fred Dibnah looks at how carpenters have used their talents to transform buildings such as Stokesey Castle, Little Moreton Hall and Harvington Hall. [S,AD] 2026-09-10 9/10. Ben Robinson unearths the past of Greyabbey, a village on Northern Ireland's beautiful Strangford Lough, and discovers the history of its moneymaking kelp industry. [S] [HD] 2026-09-10 1/2. Dan Snow and team take on the rapids of the Grand Canyon in antique wooden boats to rediscover one of the wild west's great adventures of discovery. [S,AD] [HD] 2026-09-10 1/2. Amateur footage offers new insights into life in prewar Germany and during World War II. Contains some violence and disturbing scenes. [S] [HD] 2026-09-10 Actor Spencer Banks reflects on his leading role in the 1974 Play for Today Penda's Fen. [S] [HD] 2026-09-10 An awakened force in the landscape challenges a boy's clear and intense view of the world. Contains scenes which some viewers may find upsetting. [S] 2026-09-10 1/2. Dan Snow and team take on the rapids of the Grand Canyon in antique wooden boats to rediscover one of the wild west's great adventures of discovery. [S,AD] [HD] 2026-09-10 1/2. Amateur footage offers new insights into life in prewar Germany and during World War II. Contains some violence and disturbing scenes. [S] [HD] 2026-09-10 3/6. Fred Dibnah looks at how carpenters have used their talents to transform buildings such as Stokesey Castle, Little Moreton Hall and Harvington Hall. [S,AD] 2026-09-10 9/10. Ben Robinson unearths the past of Greyabbey, a village on Northern Ireland's beautiful Strangford Lough, and discovers the history of its moneymaking kelp industry. [S,SL] [HD] 2026-09-10 Programmes start at 7.00pm. [HD] 2026-09-10 2026-09-10 2026-09-10