Animal lover Sue Perkins travels to America to meet a group of newly retired female chimpanzees at Chimp Haven, the US national chimpanzee sanctuary. After a recent change in US law, decades of medical testing on chimpanzees have been brought to an end. Cameras follow as Jill, Whitney, Paula-Jean, Tessa, Martha and Ariah settle in to the sanctuary after an 800-mile journey from a
laboratory in New Mexico to rural Louisiana.
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