It is the next stage of the journey for the rookie film-makers, and they are working high up in the forests of Long Tom Pass in South Africa as they compete to win a job at the BBC's Natural History Unit. They must overcome their fears to film 30,000 killer bees half way down a cliff face, and fruit bats in a dank cave system full of hazards.

Presenter Nick Knowles and wildlife film-maker and expert James Honeyborne are there to see how they cope with this next series of tough challenges designed to test if they have what it takes to do one of the toughest jobs in TV.

In order to get anywhere near the killer bees' nest, the teams have to do a crash course in working at heights using ropes and pulleys - all part of a wildlife film-maker's job. Back down to earth, they are also on the trail of the slightly less-fearsome vervet monkeys. The monkeys, which are usually everywhere, are nowhere to be seen. How do the teams cope, and which of them will face the last-chance challenge in the bat cave, where they will have to wear masks and special suits to protect themselves from the smell of bat poo/guano that coats the cave floor, and a rare disease only found in caves? Show less