Richard Castle:  Charlie has not been wrong yet . Maybe our killer is patient zero , other there right now on the streets of New York building an army of the undead .
Kate Beckett: Castle , what we are looking for is not a zombie but a very smart criminal who murdered David Locke and is now making our only witness look crazy . And he also dressed up in makeup and a costume to hide his identity .
Richard Castle: Unless
Richard Castle: that 's not costume or makeup .
Kevin Ryan: I mean , he does look like a real zombie .
Javier Esposito: A real zombie ? I 'm embarrassed for you , bro .
Kate Beckett: Okay , then explain this . Why would a zombie go after a currency trader , at 4AM , in a garage ?
Richard Castle: This _ one _ 's easy . The more intelligent the victim , the more delicious the brains .