him. Gellar continues to stalk Travis and his sister Lisa, and upon seeing her talk to Deb, he kills her in the playground as the Whore of Babylon, kidnapping Travis when he arrives. Chaining him in the headquarters, he berates him before branding him with an iron. Upon Dexter's arrival, Gellar is able to escape while observing Dexter. Working alone, Gellar tracks down the devoutly atheist Professor Casey, whom he sees as a false prophet and disembowels to serve as the seven bowls; he uses Casey's hand to paint a message for Travis in blood. Travis tells Dexter that he posted on his blog telling him to meet, where an angry Gellar tells Travis to repent, before knocking him unconscious. As Dexter searches the church for clues, he discovers an opening that leads to a basement. In that basement, Dexter is shocked upon seeing Gellar's dead body in a freezer, concluding that Travis was acting alone the entire time. In reality, Travis was the one who stole the sword three years prior to the doomsday killings, incriminated Gellar and came up with the gruesome idea to act out the End of Days. Gellar called Travis on his delusions and advised him to seek professional help, but instead, Travis stabbed Gellar multiple times to "prove" their immortality. Refusing to grasp reality, Travis stored Gellar's body in the freezer, keeping him alive in his delusions, until Dexter's discovery forced Travis to accept Gellar's death and move on to find new disciples. Mike Anderson Billy Brown Mike Anderson is hired by Deb as her replacement on the detective squad after she is promoted to lieutenant. Transferring in from Chicago, he initially causes friction by believing Debra is only pranking him when she introduces herself as lieutenant, which Debra dismisses to maintain her composure. He, however, begins to mesh well with the team, noting on Dexter's incredible deductive skill in bloodwork and leading the religious research division of the Doomsday Killings when he notes the religious significance of the "tableaux" as he dubs them. He is murdered in the first episode of Season 7 by Viktor Baskov. Ryan Chambers Brea Grant Ryan Chambers is a forensic intern and newcomer to the Forensics department in Miami Metro Homicide in Season 6. She attends the university Vince Masuka teaches a class for in Forensic studies. Originally a fellow student, Peter, was chosen in favor for an