Main content
![](https://ichef.bbci.co.uk/images/ic/320x180/p06n2ddt.jpg)
Tiger
5/5 A tigress must protect her cubs while battling rivals who want to overthrow her.
![](https://ichef.bbci.co.uk/images/ic/320x180/p06n2dcp.jpg)
Painted Wolf
4/5 A painted wolf matriarch's feud with her daughter threatens to bring the dynasty down.
![](https://ichef.bbci.co.uk/images/ic/320x180/p06n2dc2.jpg)
Lion
3/5 The lioness leader of a once mighty pride must now battle for their very survival.
![](https://ichef.bbci.co.uk/images/ic/320x180/p06n2d6j.jpg)
Emperor
2/5 A colony of emperor penguins in Atka Bay try to keep themselves alive through the winter.
![](https://ichef.bbci.co.uk/images/ic/320x180/p07jl6w8.jpg)
Chimpanzee
1/5 David, a chimpanzee alpha in Senegal, tries to overcome threats to his leadership.