Spring is a season when the city's hills, woods and rivers begin to emerge from winter and come to life. This episode begins with local conservation volunteer Aaron as he goes up Black Mountain. While carrying out an early-morning wildlife survey, he hears a cuckoo - the first time he has heard one on the mountain, and a sign that spring has arrived.

Local conservationist Aaron travels from his home in Ballymurphy to spend the evening on Black Mountain. He hopes to spot long-eared owls, whose chicks are beginning to emerge from their nests. Down on Belfast Harbour, at RSPB NI’s nature reserve, warden Maureen is hunting for bats, who come to feed on insects found around the reserve’s lagoon.

It’s autumn, and as the wilder parts of the city change colour, preparations are made for winter. Wild ponies arrive, ponds are built, bees are tended to and woodlands are foraged.

Despite the challenges of the cold, wet weather, there is a lot going on in the wilder parts of the city. As the weather gets colder, animals at St James’ community farm get extra bedding. On Black Mountain, Aaron has organised a team of school children to plant 100 trees.