On the series debut, after a life-altering incident, John pursues his dream of being a police officer, becoming the force’s oldest rookie.
Talia forces Nolan to confront his personal moral instincts after he encounters a kidnapping victim; Jackson confronts his failures head-on.
After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad.
The rookies are temporarily paired with new training officers; when Nolan and Lopez track down an escaped criminal.
Nolan, the rookies and their training officers get involved in a competition that pits them against each other.
Nolan and the team must help capture a cop and his former mentor from the academy after he becomes a fugitive following an assault.
Grey informs Nolan and Bishop that they are going to have a movie director as a ride-along; Bradford learns that his wife has been arrested.
Nolan and Bishop respond to a silent alarm call at a convenience store; a drug bust hits a little too close to home for Bradford.
Bradford’s wife is found shot but alive and he vows to track down the man responsible; Nolan must protect his home after a home invasion.
On Captain Andersen’s orders, Nolan and Grey are paired up for the day on patrol, as are Chen and Andersen.
An unscheduled visit by the vice president of the United States puts the station on high alert.
The most dangerous day of the year, Valentine’s Day, has the team on high alert; Nolan has everyone over for a party now that he is single.
The rookies become the prime suspects after it is discovered a large sum of money used in a drug bust has gone missing.
The rookies are really put to the test when their training officers accompany them out of uniform for Plain Clothes Day.
When a prison bus crashes, all units must respond as some inmates face severe injuries while others seek an opportunity to flee.
Officer Nolan gets a lesson in respect after his arrest of a gang member leads to a free-for-all on his life.
A massive earthquake rocks the city and throws everyone’s patrols and its citizens into chaos.
When one of their colleagues is arrested for lying on the witness stand, it leads to the release of three felons whose cases he worked on.
Gray informs the rookies that they must track down a specific set of crimes in a 48-hour period in order to qualify for their final exam.
Officer Nolan and Officer Bishop are called to a scene where the victim may be tied to a potential terrorist attack, on the season finale.