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 humour to give him an edge, he may just become successful in this new chapter of his life.
Officer Nolan and the entire team race against the clock to locate Lopez, who is in grave danger after being kidnapped on her wedding day. (S4, ep 1) Enhanced for UHD.
Officer Nolan and Officer Chen's run-in with an infamous thief tips them off to a potentially big heist surrounding the Getty's gala event. (S4, ep 2) Also in UHD.
Officers Nolan and Chen report to a structure fire and suspect that there is more to the situation than meets the eye. (S4, ep 3) Enhanced for UHD.
Officer Nolan and Officer Chen embark on a dangerous search for a missing person. (S4, ep 4) Enhanced for UHD.
ACH: When a new designer drug hits the streets, Officer Nolan and the team have a Halloween they won't soon forget. (S4, ep 5) Enhanced for UHD.
After a prisoner posts a poem presenting a riddle on Reddit, Officer Nolan and team race to solve it before anyone get hurt. (S4, ep 6) Enhanced for UHD.
Officer Nolan discovers there's more to Fred's death than meets the eye. Officers Chen and Bradford demand a treasure hunt rematch. (S4, ep 7) Enhanced for UHD.
The team goes on a city-wide hunt for an individual who is threatening to cause a mass casualty event. (S4, ep 8) Enhanced for UHD.
Wesley takes desperate measures to break free from his connection to Elijah, concocting a plot to incriminate him. (S4, ep 9) Enhanced for UHD.
Nolan has a big decision to make about Bailey. Meanwhile, the team races to investigate when a plane crashes in the middle of the city. (S4, ep 10) Enhanced for UHD.
The team must rely on a criminal and his expertise when a bigger threat looms. Officers Chena and Bradford investigate the murder of a teenager. (S4, ep 11) Also in UHD.
The team responds when a severed hand is found washed up on the beach. Meanwhile, Tim invites Lucy on a double date with him and Ashley. (S4, ep 12) Also in UHD.
Officers Nolan and Chen embark on a series of quests to get a stolen police helicopter back from a teenage thief. (S4, ep 13) Enhanced for UHD.
A Skip Tracer reaches out to Nolan and Harper for help with a case. Chen and Bradford hunt for a perpetrator on a citywide crime spree. (S4, ep 14) Enhanced for UHD.
When two witnesses for an upcoming grand jury case are murdered, the team must track down the killers before it's too late. (S4, ep 15) Enhanced for UHD.
Officer Thorsen decides to be a part of a reality show, but when the producer is killed, the team steps in. (S4, ep 16) Enhanced for UHD.
Officer Nolan and the team negotiate with a distraught man who is holding a hospital hostage to ensure his wife receives a lifesaving surgery. (S4, ep 17) Enhanced for UHD.
The team investigates a train robbery. Also, Officer Harper takes matters into her own hands as she makes a life-changing decision. (S4, ep 18) Enhanced for UHD.
Officer Nolan and the LA division of the FBI join forces with FBI trainee Simone when one of her students is suspected of terrorism. (S4, ep 19) Enhanced for UHD.
The team join forces with the FBI to stop bombs scattered throughout the city by a suspected terrorist. (S4, ep 20) Enhanced for UHD.
Sargent Grey supports Officer Nolan as he takes steps to become a training officer. Meanwhile, Tim and Lucy make Mother's Day plans. (S4, ep 21) Enhanced for UHD.
Officer Nolan is forced to spend a week in solitary confinement, while Bradford and Chen go undercover in a bid to bust drug traffickers. (S4, ep 22) Enhanced for UHD.