| Episode cast overview, first billed only: | |||
| Michael C. Hall | ... | Dexter Morgan | |
| Julie Benz | ... | Rita Bennett | |
| Jennifer Carpenter | ... | Debra Morgan | |
| Erik King | ... | Sgt. James Doakes | |
| C.S. Lee | ... | Vince Masuka (credit only) | |
| Luna Lauren Velez | ... | Lt. Maria LaGuerta (as Lauren Velez) | |
| David Zayas | ... | Det. Angel Batista | |
| James Remar | ... | Harry Morgan | |
| JoBeth Williams | ... | Gail Brandon | |
| Tony Amendola | ... | Santos Jimenez | |
| Jaime Murray | ... | Lila Tournay | |
| Keith Carradine | ... | Special Agent Frank Lundy | |
| Christina Robinson | ... | Astor Bennett | |
| Preston Bailey | ... | Cody Bennett | |
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Sage Kirkpatrick | ... | Laura Moser (as Katherine Kirkpatrick) |
Dexter discovers that one of the men who murdered his mother in front of him as a boy is still alive. He dreams that a comic-book hero based on the Bay Harbor Butcher saves his mother, and is encouraged by Lila to seek closure by confronting his mother's killer, Santos Jimenez (Tony Amendola). Doakes and LaGuerta investigate a homicide in a comic-book store, and reminisce about their days as partners. Rita's mother warns Dexter to leave Rita and her children alone. Debra begins to lose faith in her relationship with Gabriel, suspecting that he is taking advantage of her.
The press questions whether the Bay Butcher Killer is a friend of a foe. Dexter decides to perform a further investigation about the murder of his mother and finds that most of the evidences are missing. He finds that one killer is still alive running a bar in Naples, Florida, under the witnesses' protection program. He tells Lila that advises him to travel and face the past that haunts him. Meanwhile the distrustful Debra glances at Gabriel's e-mail and believes he is betraying her. Agent Lundy decides to install hidden surveillance cameras in the three possible marinas where the Bay Butcher Killer might have taken the stones and shows Debra the report of his personal investigation about Gabriel. Debra does not have time to tell Dexter about the cameras since he is in a hurry to head to Naples with Lila. In the end, Dexter and Debra find that things are not always what they appear to be.
"The Dark Defender" is another engaging and one of the best shows of the Second Season of Dexter. In this episode, Dexter finds that his stepfather had not told the whole truth about the execution of his mother. Debra also discovers that she has misjudged Gabriel that seems to really like her. The conclusion with Dexter cleaning his boat is promising. Last but not the least, Jaime Murray is sexier than I could imagine. My vote is nine.
Title (Brazil): "O Defensor Negro" ("The Black Defender")