The final episode celebrates serendipity, flights of fancy, and figaries – those wonder-filled moments that bring unexpected adventures filled with brooding bats, underground caverns, X-rated flowers, and medieval zombies.

Episode 4 celebrates people from the past and how they used nature to provide their daily needs, how they made fire to worship and bond with the Earth, and how a Dublin man harnesses the power of worms to create a vibrant community garden – and, perhaps, a blueprint for a sustainable future.