Including a special introduction from Louis Theroux, who is live-tweeting along with the episode using #watchwithlouis.

According to some reports, there are now more tigers in captivity in the US than in the wild in the whole of Asia, as well as large numbers of lions, bears and chimpanzees.

Travelling to America's heartlands, Louis Theroux spends time with an Oklahoma man who has bred and collected over 150 tigers, visits the woman who privately owns one of America's largest collections of chimpanzees, and finds himself in uncomfortably close contact with a number of big cats and dangerous primates. Show less