Liverpudlian comedian John Bishop leaves the stage behind to head to Rwanda to observe mountain gorillas in their native habitat. He's always on the go, that fella. He discovers they and his own family have more in common than he imagined possible - adolescent males are just like his teenage sons, with bulging muscles but little sense. John spends time with the Gorilla Doctors, a group of vets dedicated to protecting the 880 animals still in the wild by treating them at the first sign of illness or injury. He learns that the vets once had to amputate the bottom part of a three-day-old's leg and he not only survived, but is also on track to become a full-grown Silverback