Dexter starts to fear that Miguel may have strayed from the newly taught Code. This concern starts to put a strain on their friendship. And Dexter doesn't get a reprieve from this at Rita's either. Sylvia, noting how Miguel is never at home anymore, tells Rita that she is now convinced that Miguel is having an affair. Rita decides to confront Miguel about his indiscretions. Meanwhile, Anton is confirmed to have been taken by the Skinner, sending Debra into a furious search, not only for Anton, but also for his potential killer.