the gorilla world. reporter: and now it s titus s own son kuriyama who threatens his seat in this gorilla game of thrones. in a strategic move titus leads his tribe 4,000 feet up the mountains, but kuriyama follows. here at the top of mt. vesoki, in nearly freezing temperatures, the tribe must choose between the two. after a three-day standoff kuriyama wins a majority, leaving titus with only six of his most loyal subjects. meanwhile, to the west another battle is brewing in the remote congo rainforest, where scientists only recently discovered there could be as many as 100,000 gorillas makingç up many tribes. this one led by kingo. there s no question that he s a good silverback, and his female seems to feel the same because they ve stuck with him a long time, too.