Lisseth Chavez

The entire Boston Police Department searches for Alice Sands; the team investigates a suspicious car crash; a new romance blossoms.

An entire block of flats is forced into quarantine when cases of the deadly virus turn into an epidemic.

After zeroing in on a suspect responsible for bioterrorism, the P.D. prepares to undertake its biggest manhunt yet. Upton is torn between helping track down the perp and providing emotional support to a scared young girl who needs her.

After injuring herself while pursuing a suspect, Burgess receives a shocking diagnosis. A homicide case turns into a missing persons case, with a sinister twist. Voight has to decide between justice and the letter of the law.

Voight pulls Darius in after Crawford asks Intelligence to investigate a dangerous drug, but there is little trust in the relationship.

A murder in a Bulgarian neighbourhood results in a challenging investigation when locals won't talk to police. Ruzek has a clash with a patrol officer.