In this episode it's the summer and autumn. A fox family is playing below the Carmarthen Fans, lizards bask in the sun on limestone pavements in the upper Swansea valley and hundreds of dragonflies emerge from pools in the uplands near Brecon. On the Black Mountain foothills, sheep are gathered by shepherds on horse back and a group of dedicated volunteers are trying to repair the mountaintop. The autumn is the season when the landscape is at its most colourful. It's also a time when thousands of fieldfares arrive from Europe to escape the colder continent. Some feed on berries in trees surrounding the smallest church in Wales. In the Usk Valley, bats feed before they hibernate in caves and migrating ducks on Talybont Reservoir ready for winter. Underground, cave spiders are lurking and in the rivers, sea trout are heading upstream to spawn.