A small team takes on big polluters and wins. In this episode, the story of San Francisco Baykeeper, from its scrappy beginnings to a formidable force defending the Bay. Along the way, a deeper question emerges: What does it mean to be a keeper?

It started with a guy they called Mad Dog…

Back when San Francisco Bay was being treated like a dumping ground, one man decided to go out on the water and start paying attention. As Baykeeper, he chased down polluters, pushed reluctant agencies, and made enough noise that people had to listen.

Today, San Francisco Baykeeper fields a team of scientists, lawyers, and advocates with the same fierce energy of those early days. They take on powerful adversaries like oil companies, chemical giants, even the U.S. Navy and win victories for the Bay.

But along the way, a bigger ide ...