Dexter Morgan is the master of horrendous crimes without everyone acknowledgement, he is the master manipulator reflected through each episodes of Dexter TV Show. By using descriptive qualitative method, this study aimed to answer the following questions. The first research question is about the characters of Dexter Morgan, and the second research question is about how he conceals himself from the society. By using theories from Robert Hare's Psychopathy Checklist –Revised (PCL- R) and Hervey M. Cleckley'sThe Mask of Sanity, the questions are answered in a direct way. The results of the study showed that Dexter Morgan matches 19 from 20 of PCL- R traits from both two factors (Personality and Behavior) such as charming personality, grandiose of self-worth, proneness to boredom, liar, manipulative, lack of remorse, shallow affect, poor and early behavioral problems, promiscuous sexual behavior, lack of realistic goals, impulsive, irresponsible, cannot accept responsibility, short-term relationship, juvenile delinquency, and criminal versatility. The only exception in the trait is from second factor which is revocation of conditional release, because Dexter Morgan never got caught, so he does not need to escape or bail from restraining orders.The result of the second research question showed how psychopath or sociopath lurking around in our peaceful society filled with happiness and joys by faking a smile and superficial charming personality. Psychopath conceals themselves in our everyday lives. Based on the answers of research questions, Dexter Morgan has dominant character as a high functioning psychopath because he can manipulate everyone, undetected serial killer, and act like a wolf in sheep clothes.