From eccentric hedgehog behaviour to red squirrels making their last stand in the battle against the greys, here are the mammals of Britain as you've never seen them before.

Join Fiona Mathews and Tim Kendall on an overnight stakeout in search of the elusive pine marten. Follow them down mines inhabited by greater horseshoe bats, cavers, ravers and teenagers smoking unusual substances. Meet water voles thriving in the East End of Glasgow - despite the lack of water - and observe the brilliance of wild boar in your back garden.

Lively and light-hearted, Four Legs Good puts animals at the heart of the story, revelling in their peculiarities, with a few corny jokes along the way. In search of answers to the problems that beset our wildlife, Fiona and Tim reveal the wonder of creatures that are worth fighting for.