ABC gave confirmed they have picked up  Nathan Fillion’s new show, ‘The Rookie’ straight to series. 

The Rookie is based on a true story and follows the tale of John Nolan (played by Nathan), 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 L.A. to pursue his dream of being a cop. Now, surrounded by rookies twenty years his junior, Nolan must navigate the dangerous, humorous and unpredictable world of a “young” cop, determined to make his second shot at life count.”
Nathan will also receive and executive producer credit for the series. 

Source: Deadline.