Special Agent Gibbs and company are tested like never before with a flurry of high-stakes cases involving international espionage, al Qaeda plots, brutal serial killings and double agents.

Back with a vengeance for a sixth season of suspense and unexpected twists. It's been a year since last season's shocking and heartbreaking conclusion, and mild mannered criminologist-cum-grisly serial killer Dexter Morgan has come to terms with who he is. But his existence is shattered when he crosses paths with an enemy unlike any he's faced before. A delusional religious zealot with unflinching convictions, this new adversary soon draws Dexter...