S3, E11: Lt Laguerta begins to suspect that Miguel Prado may be Ellen Wolf's killer. She invites him for dinner and checks his car for forensic evidence, but he catches on to what she is doing. Dexter starts working on his plan to kill Miguel and frame The Skinner for the crime. Debra has been avoiding Anton and Dexter tells her about their father, who also had an affair with a confidential informant.