
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.

Ahead of Bailey's return home, John looks for clues to locate Jason Wyler; Tim and Lucy swap rookies; a friendly face resurfaces at the station; Wesley feels unsettled over Angela.

Following his stint at the LAPD, Wesley returns to the DA's office where his past connects him to the team's investigation; Bailey and John have conflicting feelings over safety; Lucy grows suspicious of Seth.

John and the team welcome two new rookies and continue the hunt for two dangerous inmates with very personal vendettas following their prison escape.

The team searches for a serial killer; Nyla struggles with the aftermath following the attack; Lucy's relationship with Seth takes a turn; Bailey battles her fear of Jason Wyler.