'Dexter' Season 7 in 6 Clicks
Does Dexter really have a dark passenger which is responsible for causing him to kill? Both Hannah and then later Harry made the serial killer question his supposed "dark passenger." They forced him to see that all this time it has actually been him who is actually responsible for his actions, and not this unknown force making him commit murder. This urge to kill is simply a part of who he is. This season Dexter veered from his trusty code to kill Hannah's father to protect her from heading to jail.
Source: Robert Tepper/Showtime