Matt Baker and Ellie Harrison uncover the wonders past and present of Cranborne Chase.

Matt unravels a puzzling piece of the area's past as he explores a 900-year-old mediaeval ‘miz maze' hidden in the woods, before crossing the Chase to help tend to Britain's biggest modern day maze on the Longleat Estate. Ellie joins the UK's only ‘supercluster' of farmers working together to encourage wildlife on their land. She also heads to the River Ebble to disccover what makes this chalk stream so special and how it's helping to give rural teenagers a sense of purpose. Steve Brown is in for some special stargazing in the Chase - the UK's first designated dark sky reserve. Tom Heap investigates plans to launch a new space race from the heart of our countryside – but at what cost to the environment? And Adam Henson has a nervous wait on his hands as his rare-breed Suffolk Punch Lexi goes to the maternity unit.

Plant Britain is all about encouraging community gardens and planting wildflowers in a two-year initiative to help combat climate change, help wildlife and pollinators and transform our own wellbeing. Matt Baker and Margherita Taylor help Bristol locals to create a community garden, and Charlotte Smith visits a project in Glasgow that is blooming. Sean Fletcher is in Northern Ireland with primary school children to find out about their field-to-fork project. Helen Skelton is with a young botanist who is on a mission to save our native wildflowers, while Joe Crowley discovers the secret life hidden in a special meadow in north Wales. The Natural History Museum do some cutting-edge soil and pond DNA forensics, and John Craven finds out how to do your bit no matter how small a space you have - from a pot on a windowsill to a balcony planter. Also, look out for special messages from some well-known faces.