Based on the acclaimed novel Darkly Dreaming Dexter by Jeff Lindsay, Dexter is a crime drama about Dexter Morgan (Michael C. Hall), a man who leads a double life as an incredibly likeable forensics expert for the Miami Police Department and as an emotionless vigilante serial killer. Taught by his foster father (James Remar) to harness his lust for blood and killing, Dexter lives by his own strict moral code -- he only kills murderers who can't otherwise be brought to justice. The irony of Dexter's life is that he works closely as a blood splatter analyst with the very people who hunt his kind -- the homicide department. Dexter's "Regular Joe" front is in full force while working alongside the ill-tempered Sgt. James Doakes (Erik King), who seems to be the only one to sense Dexter's more sinister side; Lt. Maria LaGuerta (Lauren Velez), the head of the division; and Det. Angel Batista (David Zayas), whose similar attention to detail and taste for forensics almost mirrors his own. While his sister Debra Morgan (Jennifer Carpenter), a tough and determined cop, leans on Dexter for personal advice and career advancement, the person Dexter connects with most is his emotionally damaged girlfriend Rita (Julie Benz), who keeps him grounded. In 2007's Season 2, Dexter begins to doubt his murderous capabilities and continues to be haunted by his past. His difficulties multiply when evidence of his deadly after-hours activities begin to surface and the FBI is brought in to investigate the city's new serial killer dubbed the "Bay Harbor Butcher." The four-disc set contains all 12 Season 2 episodes that aired on cable network Showtime, along with extras such as a podcast, interview, and more.