She graced the cover of National Geographic twice, authored a bestselling children’s book, and single-handedly changed how the world saw her species. But behind the heartwarming image of a 300-pound gorilla cradling a kitten lay a scientific civil war, a bizarre custody battle, accusations of deception, and truly surreal lawsuits.

This episode pulls back the curtain on Koko, examining the pop-culture icon versus the scientific subject. We ask the question that defined her entire life: did she actually talk to us, or were we just talking to ourselves through her, projecting our own desperate need for an animal that thinks like a human?

• How Francine Patterson’s maternal attachment sparked a custody war and a black-market gorilla purchase to replace Koko at the zoo
• The syntax-versus-vocabulary debate and how the Clever Hans effect and the Nim Chimpsky tapes undermined the language claims
• The 2012 staff walkout and reports of obesity, processed food, and up to 100 naturopathic pills hidden in turkey and beer
• The disturbing nipple lawsuits and how Koko’s fixation actually reflected an ape deprived of a normal gorilla troop
• How Patterson allegedly mistranslated Koko’s “nipple” sign as “people” to protect the foundation’s wholesome public image