Six months into his career as a cop, John Nolan (Nathan Fillion), the oldest rookie in the LAPD, has used his life experience, determination and sense of humor to keep up with rookies 20 years his junior. But as he embarks on the second half of his rookie year, Nolan will be put to the test by a host of new challenges, romantic relationships and deadly criminals, as he looks to figure out what kind of cop he ultimately wants to be.
Nolan becomes a target 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.
Sgt. Gray informs the rookies that they must track down a specific set of crimes in 48 hours.
Nolan and Bishop are called to the scene of a murder that may be tied to a terrorist attack.