Brett DelBuono

Detective Slaughter returns to enlist Castle's help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he's guilty or help to prove he's innocent.

Cooper gets bad news about Charlotte's sexual assault case; a case involving a pregnant drug addict hits Addison hard.

Cuddy receives news that forces her to re-evaluate her priorities; a teenage patient's suspicious body scars suggest his illness is more than physical.