As the great wildebeest migration begins, National Geographic explorer and wildlife filmmaker Bertie Gregory arrives in the Serengeti to follow the world’s fastest land animal, the cheetah. Watch as he reveals the cheetah’s world, from a devoted mother raising her vulnerable cubs to young males carrying out breathtaking team hunts, uncovering the hidden challenges this iconic species faces. Watch Cheetahs Up Close with Bertie Gregory, Sunday 4th January at 7pm, on National Geographic WILD UK | N