Things turn dangerous for two rangers as they encounter armed poachers who are determined to put up a fight.
In the final episode, there is a full moon, known to rangers as a 'poacher's moon' because it gives them light by which to hunt.
Rangers Lionel and Lunga are forced to babysit a rhino mother and calf for the night after they get too close to the reserve’s fence.
They also become involved in a police operation to catch some of those trading in rhino horn.
Meanwhile up north, the rangers set an ambush to catch a poacher who has been setting snares. But things are getting dangerous.
Chrisjan and Freddie follow tracks through the bush and come across armed poachers who are determined to put up a fight.
The anti-poaching rangers risk their lives every day to save South Africa's wildlife, but when they see a rhino mother and calf, Freddie says: "If nothing is done, this will become just a memory. It would be terribly sad if our children did not see these things."