A documentary looking at the hidden behaviour of bats, centred around one of the largest horseshoe bat colonies in the UK - and following leading scientists in the UK and abroad as they carry out research to find out more about how to protect this unique species. A number of stories scripted, filmed and directed by Janine Finlay.
To be transmitted Monday 26 October 2020 at 9pm on BBC2 and BBC4 on Halloween at 7pm!