I already answered this a year ago he's a blood spatter specialist and had blood packs underneath his jacket so his son would think that he died I'm sure he took a ketamine shot and wakes up in the morgue and escapes this is the simplest and easiest answer
That is entirely untrue Hannah was one of the most loved characters on Dexter she was smart beautiful and loved Dexter and he loved her they should absolutely bring her back whether it's as a memories or giving him advice but she was amazing I don't know where you're getting your information from but that is totally untrue