Fans of the movie “Free Willy” are outraged to learn that the real whale who played Willy lives in a tiny pool at an amusement park in Mexico City. So well-intentioned experts embark on an epic science experiment to try to teach one celebrity orca how to be free — while the world watches. Sign up for our newsletter to see photos and videos of Keiko, and get a behind the scenes look at the making of The Good Whale. Sign up at nytimes.com/serialnewsletter Subscribers to the New York Times can listen to all episodes of The Good Whale early...