Castle (2009)

S4E22 Undead Again

Castle and Beckett dive into the case of a murder victim found with human bite marks, prompting Castle to unleash his outlandish theories. However, their sole witness claims the culprit was a Zombie. As clues increasingly suggest a supernatural attacker, the duo explores New York's underground Zombie scene in their quest to capture the murderer, whether he's living, dead, or something in between.