Season 7, Episode 7 - Dexter once again makes plenty of bad decisions because of a girl.
Dexter, our beloved serial killer, seems to have a bad habit of making the worst decisions whenever he becomes involved with a girl. The only exception to that rule (depending on your point of view) would be Luman from season 5. At least with her he was doing what he does best - hunting down and killing the bad guys. But given his growing relationship with Hannah, Dex may have bitten off more than he can chew.
