Season 1
Episode 1
About the Episode
In 1971 Penny Patterson began teaching sign language to a gorilla named Koko, unaware that this relationship would define both their lives. Over 40 years on, now internationally famous, Koko continues to redraw the line between people and animals.
Aired:
08/01/16
| Expires: 09/30/20 | Runtime: 54m 51s