Will a months-old murder help Lisbon collar the elusive Tommy Volker? The CBI team investigates the death of a geologist – a murder, which Lisbon is convinced is the key to bringing down multimillionaire Volker.
Miami Metro continues to hunt for the "Brain Surgeon"; Dr. Vogel seeks Dexter's help; Deb must take matters into her own hands.
Dexter must protect himself when LaGuerta closes in on his secret.
Christmas approaches and Dexter tries to balance his life with Hannah and his relationship with Debra; Debra follows a potentially incriminating tip.
A murder hits Dexter close to home just as he decides to make a new life for himself with Hannah.