Season 4

October 18, 2009

Rita goes to a wedding with the kids, allowing Dexter to have his own little vacation. He does what he does best when alone, hunt, and goes after an officer with a dark secret.

October 25, 2009

Dexter is inspired to investigate the Trinity Killer on his own, while Debra blames herself for an event that was out of her control, and Rita realizes how little she knows her husband after discovering one of his secrets.

November 1, 2009

Dexter doubles his efforts to stay ahead of the official Trinity investigation, and receives relationship advice about the friction between himself and Rita from a most unexpected source.

November 8, 2009

Dexter finally strikes a balance between family, career and his secret life, but is thwarted in his pursuit of his next victim, while Debra expresses a renewed and unwelcome interest in their father's checkered past. Miami Metro Homicide tries to solve the Model Killer Case.

November 15, 2009

Dexter wonders if his father's Code is truly the right path, and hopes to get answers by accompanying Trinity on an out-of-town road trip to Tampa; Debra discovers that her single-minded pursuit of Trinity has blinded her to the true identity of her assailant.

November 22, 2009

Dexter learns more about Arthur's bizarre and twisted world, while Rita has her hands full preparing Thanksgiving dinner for a full house, Debra uses the holiday to further investigate Trinity, and Batista gets closure on an old case.

November 29, 2009

The disappearance of a ten-year-old boy forces Dexter to question his assumptions about Trinity, while Cody defends one of Dexter's lies and Masuka is unable to face what he witnessed on Thanksgiving.

December 6, 2009

Dexter must buy time to protect himself when Debra's investigation brings the department one step away from identifying Arthur as the Trinity Killer; Rita confides in Dexter, but is disappointed in the result.

December 13, 2009

Dexter and Arthur are on a collision course.