The Okavango Delta in Botswana is so large it is visible from space. This is home to an alphabet of wild animals, from aardvark to zebra. And some of the smallest mammals live here. Meet the Mongoose gang. They may look cute and cuddly but they'll do whatever it takes to protect themselves. And it's a never-ending battle. Snakes, birds of prey and other predators are always lurking, dive-bombing or attacking. Survival is tenuous - especially being so little, and vulnerable. Preservation of the gang depends on keeping up the numbers. As many as eight generations of mongooses live together. We follow one gang as it struggles to endure. Besides predators, they have to deal with the threat of nature. A flood forces them to evacuate the abandoned termite mound they inhabit in search of another safe haven. The journey becomes a gauntlet of peril. They risk injury... and death. But nothing will stop them from reaching their new home. If they can keep growing in numbers this gang will beat the odds. More than anything, they are a loving and caring family. It's what has kept them going. And it will keep them going. They're small but they're feisty. They're survivors. They're banded brothers.