Well, look who's breaking bad now! Debra Morgan dropped quite a bomb on her brother in the ultimate moments of Sunday's 'Dexter' episode "Chemistry," one that will likely change their entire relationship across the rest of the series. Meanwhile, Hannah McKay (Yvonne Strahovski) won't know what hit her, now that Deb's out for blood! So has the Miami Metro lieutenant completely joined the dark side, or will she relent in her quest for justice? Watch Deb go off the rails in the latest clips from next Sundays's all-new 'Dexter' episode "Argentina!"