The lion's social nature has made the species a complicated yet fascinating beast. Within the pride it's the females who run the show, while males have a warrior role. This social structure allows prides to control large areas where game is abundant. Their social lifestyle and the places where they live make them the most often seen of all the big cats but this visibility masks a darker truth. In the last century lion numbers have declined by as much as 90%. With as few as 25,000 lions left, this programme reveals how understanding their social lifestyle in detail is vital if we are to protect these unique cats for future generations.