We follow the fortunes of Critical as he tries to find a family and fend off male rivals.
A team of biologists find out how nature's giants evolved and how they function.
The story behind one of the most important scientific discoveries of the modern era.
A scientist joins an activist to find out why these beautiful creatures are endangered.
David Attenborough recounts his experiences with the mountain gorillas of Rwanda.
Patrick Stewart narrates this three-part series about the world's last mountain gorillas.
For 18 years Dian Fossey worked tirelessly on saving mountain gorillas from extinction.