12 episodesFirst aired 30 September 2007
In season two, the bodies of Dexter's victims are uncovered and an investigation is launched in Dexter's own department to find the killer, dubbed the "Bay Harbor Butcher." Debra struggles to recover, and Rita sends Dexter to Narcotics Anonymous meetings when she suspects that he has an addiction. Sergeant James Doakes, stalks Dexter, suspecting that he is connected with the "Ice Truck Killer" killings.
E1Sept 200753m
Things are really beginning to heat up for Dexter: Doakes' suspicions about him are growing, his victims are escaping, and his body dump site has been found. Meanwhile Paul is troubling Rita over the missing shoe and Debra is going through trauma over the Ice Truck killer incident.
E2Oct 200756m
Dexter is finding it hard to have closure on killing his brother. There is a new FBI agent to head the "Bay Harbor Butcher" case. Debra is finding it tough to put the past behind her.
E3Oct 200752m
Dexter's inability to deceive has him pursuing a slick liar as his next victim, while Rita believes he's concealing a drug problem and forces him into a 12-step program where he meets Lila, a seductive new woman.
E4Oct 200753m
Rita's estranged mother visits and senses something is wrong with Dexter. Masuka thinks he's developed a lead in the Bay Harbor Butcher case, which has Dexter concerned. Angel's interrogation of a witness crosses a line.
E5Oct 200756m
Dexter discovers that the man who murdered his mother in front of him as a boy is still alive and confronts the killer as part of his recovery from addiction - but he also discovers that old impulses die hard.
E6Nov 200753m
A copy-cat killer follows the lead of the "Bay Harbor Butcher." Dexter must destroy an incriminating surveillance video.
E7Nov 200755m
Dexter manages to get Doakes off his back. He devises a plan to get the police in another direction. Lila and Dex's relationship intensifies, and he has some interaction with Rita and the kids.
E8Nov 200749m
Dexter is attacked by the man who murdered his mother. Meanwhile, Lila wants to get closer to Dex, and Debra and Lundy close in on the Bay Harbor Butcher.
E9Nov 200750m
Dexter realizes it won't be easy to end things completely with Lila. Dexter tries to stay ahead of the investigations as the manhunt for the Bay Harbor Butcher intensifies. An enemy of Dexter figures out his secret.
E10Dec 200755m
Doakes follows Dexter to his next crime scene and shocks him with a revelation about Harry. The Bay Harbor Butcher task force feels they are zeroing in on their man.
E11Dec 200751m
Dexter must make a massive decision that will have an effect on all those he holds close. Lila meanwhile is back with a secret to blackmail Dexter.
E12Dec 200751m
Special Agent Lundy and the FBI finally settle the case of the Bay Harbor Butcher, but the heat's not entirely off Dexter as the flames literally close in.