Hal Devi

A discharged Navy Intelligence officer, suffering from post traumatic stress disorder, is the sole survivor of a deadly dispute being investigated by the team. Kensi connects with him personally.

The unit investigates an urban vampire in New York who kidnaps his victims at night and holds them underground in the sewer system.

Max joins Caroline on a trip to visit her father in prison. Recurring guest star JENNIFER COOLIDGE appears as Sophie, the girls' upstairs neighbor.

Beckett and the team return to the NYPD academy training ground to investigate the murder of a recruit officer.

The team is called upon by the governor when a virus leaves his daughter with only 24 hours to live; Walter receives a letter about his sister.

Ben makes a new imaginary friend named Omicron, who is from Jupiter and talks like a robot, and he starts to act out by doing favours for him. Meanwhile, Mickey tries hard to quit smoking.