During a season on the road with top college basketball referees, Bob Katz watched the games they officiated, listened in on their candid conversations in locker rooms and hotel lobbies, and explored the challenges they must regularly confront. Like many closeup, granular looks at an insular world, The Whistleblower is about much more than its titular subject. It's about excellence, and dedication to craft, and its mostly for this that I loved working on it. And, in this portrait of one consummate professional at the top of his game, Katz pulls off an unbelievable feat: In The Whistleblower, we come to actually root for the ref.