Series star Michael C. Hall revealed he was afflicted with Hodgkin’s lymphoma in January 2010, but continued to work on the series. Most of his fellow cast members were surprised by the news, because he had not disclosed his condition during production. 

The advertisement on Foxtel in Australia promoting Dexter was pulled after the South Australian government filed complaints regarding the mention of Adelaide (a city in South Australia) having the highest serial killer count per capita. 

Dexter’s fake DEA license to obtain the M-99 Ethorpine Hydrochloride animal tranquilizer is registered to: Bateman, Patrick M.D. 2203 Blanchard Ave, Ft. Lauderdale, Patrick Bateman is the main character in American Psycho - and as Dexter, also a serial killer.

Sgt. Angel Batista at times refers to Dexter as “socio” when speaking to him as a friend or in confidence. This is a clever English/Spanish play on words. While “socio” in Spanish means “associate” or “partner”, it is also the beginning of the word “sociopath” (in both English and Spanish) 

The name of the main character, “Dexter,” is also a Latin word meaning “right hand.” The implied complement is the Latin for “left hand,” “sinister,” reflecting his hidden dark side. In 2010, author Jeff Lindsay confirmed at a book signing in Edinburgh that he chose the name Dexter because it was the opposite of “sinister”, reflecting the character’s surface normality