Dexter Cornell, an English Professor becomes embroiled in a series of murders involving people around him. Dexter has good reason to want to find the murderer but hasn't much time. He finds help and comfort from one of his student, Sydney Fuller.

Based on Jeff Lindsay's novels Darkly Dreaming Dexter and Dearly Devoted Dexter this crime thriller follows Dexter Morgan. Dexter is a forensic blood spatter expert for the Miami Dade Police Department. He is the main support for his sister. He has a steady girlfriend, with two kids who adore him. He also has an active "night life". Based on a code instilled in him by his foster father, Harry, he hunts down people who have escaped justice and makes sure they don't get away with a crime again.

Episode Summary:
Dexter and Homicide race against a lunar eclipse to catch the Doomsday Killers before their final gruesome act; Debra struggles with a new emotional reality.

Dexter receives help from an unexpected source while hunting for the Doomsday Killers and trying to stay a step ahead of the Homicide Division. Meanwhile, Debra’s visits to her therapist uncover something surprising.

Dexter Morgan is not your average serial killer. He enjoys his day job as a blood spatter analyst for the Miami Police Department . . . but he lives for his nighttime hobby of hunting other killers. Dexter is therefore not pleased to discover that someone is shadowing him, observing him, and copying his methods. Dexter is not one to tolerate displeasure . . . in fact, he has a knack for extricating himself from trouble in his own pleasurable way.

Dexter Morgan is not your average serial killer. He enjoys his day job as a blood spatter analyst for the Miami Police Department . . . but he lives for his nighttime hobby of hunting other killers. Dexter is therefore not pleased to discover that someone is shadowing him, observing him, and copying his methods. Dexter is not one to tolerate displeasure . . . in fact, he has a knack for extricating himself from trouble in his own pleasurable way.