Starting over isn't easy, especially for small-town guy John Nolan who, after a life-altering incident, is pursuing his dream of being a police officer, on the premiere episode of "The Rookie". As the force's oldest rookie, he's met with skepticism from some higher-ups who see him as just a walking midlife crisis. When you throw in a workplace romance, a hostage situation and some tough love from their new training officers, the latest Los Angeles police rookie class has an uphill battle ahead of them.