It's close to Halloween and a man is found murdered in a graveyard - with a stick through his heart and sporting fangs. Castle and Beckett track the murderer to a vampire cult.
Castle and Beckett investigate the murder of a bike messenger and the past of a prominent family figures into the investigation.
Dr. Leanne Rorish puts her new first-year residents right to work at Angels Memorial Hospital, home to the busiest ER in the nation.
The Rocky Horror Picture Show forms the basis for an unusual episode, centring on the 1977 death of a Philadelphia doorman.
A gang member's death seems related to the death of the wife of Hunter's friend.