
Starting over isn't easy, especially for small-town guy John Nolan, who, after a life-altering incident, is pursuing his dream of becoming an LAPD officer. As the force's oldest rookie, he's met with skepticism from some higher-ups who see him as just a walking midlife crisis. If he can't keep up with the young cops and the criminals, he'll be risking lives -- including his own -- but if he can use his life experience, determination and sense of humor to give him an edge, he may just become successful in this new chapter of his life.

The team launches a high-stakes search to take down a notorious criminal; Lucy's leadership is tested; Wesley tests the boundaries of his friendships; Nolan tries to balance duty and family.

Nolan and Harper try to help a desperate mother protect her child; Lt. Grey and Garza continue to work with Monica despite their misgivings.

Nolan is put to the test when he's forced to protect a man he doesn't trust; Lucy and Celina follow a promising lead; Lopez finds herself conflicted about Wesley's new position.

A troubling incident at a school draws the team into a complex case; Celina's temporary missing persons assignment leads her into a dangerous situation.