Top 20 Serial Killers on Dexter

For a show about someone who takes down serial killers, "Dexter" has naturally had some pretty interesting characters. For this list, we’ll be looking at the most dangerous and intriguing murderers on this crime drama series. A spoiler alert is in effect. Our countdown includes Travis Marshall AKA The Doomsday Killer, Arthur Mitchell AKA The Trinity Killer, Nurse Mary, Hannah McKay AKA Passionate Poisoner, and more! Which serial killer do you think made “Dexter” such a chilling show to follow? Let us know in the comments.