Joel travels to Zambia to investigate Africa’s most successful predator, the spotted hyena. He learns their many unusual traits - highly social, dominated by females, and the only animals on earth capable of biting through bone. It becomes clear there is a hyena clan operating near camp when they are heard in the river and captured on camera traps breaking into the camp’s kitchen. Joel constructs his pod nearby and uses hyena-call recordings and a puzzle box to test a key hyena attribute: intelligence.