Crystal Coney

An emergency alert of an impending missile attack sends Los Angeles into chaos and uncertainty, while the officers each try to keep the peace and deal with their own disasters.

After rushing his son to the hospital following his collapse, Nolan is reunited with his ex-wife, and they must come together to help their son; Detective Lopez discovers La Fiera is in the same hospital and wants to find out exactly why.

Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic holiday.

The pressure is on for Officers Nolan, Chen and West as their training officers evaluate whether they are truly ready for the job. One of the rookie classmates is involved in a shooting.

Nearing the end of his training, Nolan faces his biggest challenge as a police officer yet when he must come to terms with the choices he has made in pursuit of the truth.

The team responds to the report of a severed hand washing up on the beach and are on the hunt to find its owner; Tim attempts to prove he isn't a control freak to Lucy and invites her on a double date with him and Ashley.