Lizette Carrion

Dexter and Debra try to dissuade their boss from pursuing a security guard they believe he has wrongly identified as the Ice Truck Killer. Meanwhile, Dexter's girlfriend receives an unwelcome visit from an associate of her imprisoned husband.

The Ice Truck Killer is finally identified, but something about the suspect doesn't sit right with Dexter, who must also deal with the menacing return of Rita's paroled ex-husband.

Detectives' tempers threaten a case involving a man suspected of killing his child; Medavoy is eager to share his knowledge of Judaism.

Sipowicz arrives on the scene of a homicide where Shannon and Laughlin are both present. Sipowicz requests that Laughlin leave the scene.