When Pan finds a 21st-century recording of a rainforest, she has no idea what it is…

An environmental thriller starring Pearl Mackie, Tanya Moodie and Pippa Haywood.

Theme music by Bonobo.

Written by Timothy X Atack.

Director: Becky Ripley

Each episode comes with its own talk and soundscape.

And you can take part in our interactive experiment to see how you respond to sounds of nature at: bbc.co.uk/forest

#Forest404