This is the first time Dexter says "I love you". He says it while on the phone with Harrison, his son. He usually replies "me too" when someone else says it to him.
Quinn's apartment number is 103. Another allusion to October 3rd as seen several times before.
First time Dexter actually wraps his victim in plastic. Up to this point he only secured them to the table with it.
Masuka is explaining auto-erotic asphyxiation to Dexter and the other members of Miami PD. In Six Feet Under (2001), it is Michael C. Hall's character, David Fisher, who explains auto-erotic asphyxiation to his coworkers in Back to the Garden (2002).
The song played at the nightclub when Quinn is drinking is from brazilian DJ Malboro. It's called "Som de preto". The lyrics "É som de preto / de favelado / mas quando toca / ninguém fica parado" means "It's black's sound / from the slums / but when it plays / nobody stands still".