Dexter: Season 4, Episode 10

4 - 10: Lost Boys

Dexter finally believes he understands the beast Arthur Mitchell, known as the Trinity Killer. But when a ten-year-old boy (Jake Short) goes missing, Dexter is forced to question everything he's learned up to this point. It's a race against the clock to find the boy before Trinity kills him, and with each step forward, Dexter has to confront the real possibility that he may have more in common with Trinity than he'd like to admit. Secrets abound - from Cody, who is forced to defend one of Dexter's lies, Masuka, who can't bring himself to confess what he witnessed at Thanksgiving, and Debra, whose recent discoveries force one of Miami's finest into making an impossible decision.