At the church, Dexter frees Travis from being tied up. They try to predict who Professor Gellar's next victim will be. Dexter see's something written on a painting which points them to the next victim. It is Professor Casey, who is an atheist. Dexter puts Travis up in a hotel to keep him safe from Gellar.
Dexter attends one of Professor Casey's lectures to see how he can save him. Dexter comes up with a plan and brings Travis with him back to the school last at night. They split up and Dexter ends up trapped in an elevator. Travis gets him free and they go find Professor Casey, but it is too late. He is dead and his hands have been chopped off. His hands appear back at Travis' hotel room with a bloody message attached.
Dexter and Travis return to the church. Dexter finds Travis unconscious on the floor, then he finds Professor Gellar's body in the freezer. It turns out that Travis has been the killer all along.