Watch ABC's The Rookie Trailer

Inspired by a true story, The Rookie centers on John Nolan (Nathan Fillion), the oldest rookie in the LAPD. At an age where most are at the peak of their career, Nolan cast aside his comfortable, small-town life and moved to Los Angeles to pursue his dream of being a cop. Now, surrounded by rookies 20 years his junior, he must navigate the dangerous, humorous and unpredictable world of a "young" cop, determined to make his second shot at life count.