Watch on SFlix. Keiko, the world’s most famous orca, was the star attraction at an amusement park in Mexico City and an icon for an entire generation. For years, he lived in a human-designed world. Hollywood thrust him onto the global stage as the star of Free Willy, sparking a worldwide animal rights movement. What began as a dream shared by millions of children to see him return to the ocean transformed into one of the most ambitious and controversial animal reintroduction experiments in history.