Countryfile is in the heart of England on the beautiful borderland of the Black Country, where Matt Baker explores two of the most important 18th-century English gardens - Hagley Park and the Leasowes, both of which are going through major restoration projects. He discovers the history of the great men behind the gardens, George Lyttelton and William Shenstone and gets stuck in restoring the cascades at Hagley Park. With a little help from Ellie Harrison he adds the finishing touches by releasing 100 golden rudd into the lake. Ellie explores the mysterious Kinver Rock Houses. Inhabited right up to the 1960s, they are now a haven for wildlife. She also discovers how the rich geology of the area sparked the onset of the Industrial Revolution. Meanwhile, Adam Henson's competitive streak comes to the fore when he and his son Alfie take their poultry to the Cheshire Show. Antibiotic resistance has been called one of the greatest threats to modern human health. Charlotte Smith investigates whether giving medication to farm animals is making the problem worse.