 He first meets Dexter face-to-face in a shipping container located in the same place as the one where their mother was murdered, with Debra tied up and ready for Dexter to kill.Rather than killing either Debra or Brian, Dexter lets him go, whereas he kills him in the TV series, recognizing that it is the only way to save his sister.Their professions differ as well; the books have Brian working with imports, while the series has him as a prosthetic surgeon.