After a vampire is killed in a prostitution sting, Billy is kidnapped. And a seemingly routine zombie kill in a doughnut shop leads to a death among the TV crew.
Stubeck is worried about a vampire prostitute after he and Billy release her from the station. Meanwhile, teen vigilantes go after zombies, and Dashell takes Kirsten out on the beat.
Vampires hijack bloodmobiles in a murderous attack, and Kirsten is sent to check upon Dashell's niece at a party thrown by a vamp preying on local teens.
The UTF is called to a porn shoot when one of the actors goes werewolf on the castand crew, and Kirsten is sent on werewolf lockdown.
John-John discovers that a family member is a zombie. Meanwhile, Kirsten joins Carla on a zombie kill, and Billy and Stubeck find that the vamps have new ways of obtaining blood.
Carla and John-John are under department supervision, and Stubeck and Billy find a new way to kill zombies.
Billy and Dashell hunt down the vamp who beat up Stubeck. John-John takes something from a zombie that doesn't belong to him, and Kirsten dates a guy who may have a fatal flaw.
Carla goes undercover as a vampire prostitute, while Billy and Stubeck find that the vamps are using zombies in new and dangerous ways.
When Kirsten's cover is blown, Dashell goes after the vamp who's been preying on his niece. Meanwhile, Billy and Stubeck deal with a zombie sighting at a school, and Carla gives John-John a peek into her private life.
After a swarm of zombie prisoners takes over the UTF precinct, Captain Dashell and his crew must use their wits and training to regain control of the station.
Stubeck looks for a mole on the UTF force, while Dashell attends a vamp funeral and Carla and Kirsten visit a woman who can't say goodbye to her zombie husband.
In the season finale, Stu and Billy set the terms of a peace summit between Captain Dashell and Santos while Landry and Carla uncover a dangerous secret inside the Valley hospital.
