Let's see if Rita's kiddos, Astor and Cody will still be around for Dexter to care for. Click the link below to read more...
Executive Producer Sara Colleton says: "They are referenced, but they haven’t really played in to the story this season. Because a year has gone by, they have their own lives. They’re in Orlando having a good time and they don’t want to leave. They’re happy that they have Harrison, but they are in a part of a kid’s life when they have other things going on."
Source: TVLine