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Paul Martin is in the Cotswolds to discover how farmers and police are battling a 拢44.5million crime wave. Medieval-style defences ringing farm fields meet 21st car technology as Paul road-tests the ramparts. Have they stood the test of time or will they stop him in his tracks? And he goes for a spin in an all-terrain Polaris to find out how police can outwit criminals.

In the second of her reports from Westonbirt National Arboretum, Margherita Taylor investigates how experts and volunteers are on the front foot in the fight against climate change - from examining seasonal changes in trees to beating bugs and globe- trotting to rescue rare and threatened species. She finds out why our trees are more than just a pretty face. But if our forests and woodlands are destined to change, who will be the wildlife winners and losers?

Paul Martin reveals his Top Five Favourite Autumn harvests.

With eight million pieces of plastic seeping into our oceans every day, the battle against pollution has never been more urgent. But, as Jules Hudson discovers in the seafood capital of Scotland, shellfish could save the day. He meets scientists just outside Oban who are using a wonder substance from the discarded shells of the likes of scampi and crab to develop not just a compostable replacement for plastics but also help to extend shelf life to drastically reduce food waste.聽

Matt Baker is at RSPB Fairburn Ings, an important site for wading and water birds. The reserve is maintained by volunteers. But at Fairburn Ings there are a group of youth volunteers, fully fledged rangers, doing the same job as their adult counterparts. Elliot Roberts is a 15 year old who鈥檚 been a full time ranger for several years, a keen photographer and bird watcher his enthusiasm is contagious. 聽Matt also meets Kate Struthers, the visitor experience officer who explains the background to Fairburn Ings and the young rangers project.

Keeley Donovan is in Nottinghamshire at a special sanctuary to meet farm animals with psychological and physical challenges which might otherwise be destined for that great field in the sky.聽 From a one-legged duck to a sheep with too many teeth, Keeley finds out how this sanctuary is giving these animals a new lease of life.