 Travis Marshall is a researcher in artifacts, professionally a bible restorer who is tied to the Doomsday Killings (DDK, also stands for 'Doomsday Killer') and the main antagonist of Season 6.He is in fact directly involved in these murders, with mentor Professor James Gellar passing on his legacy to his student, making him believe that every murder committed is justified.However, his empathic nature leads to him to come in conflict with Gellar's demands.