Answer
Jimmy Smits joined the series Dexter as ADA Miguel Prado. Dexter is a crime drama series that premiered on Showtime in 2006. The series follows Dexter Morgan, a forensic analyst for the Miami Metro Police Department who moonlights as a serial killer. Smits' character, Miguel Prado, is a district attorney who becomes a mentor to Dexter and eventually becomes a victim of Dexter's.