The final episode, appropriately titled "Sins of the Father", resolved the fate of Dexter Morgan ("Michael C. Hall), a serial killer who had cheated death many times before and finally accepted it. Harrison (Jack Alcott), Harrison's son, was able to dispatch the serial killer and bring the boy back from the brink.
Harrison stated, "I want to become normal," in a moment when Dexter reflected on all the collateral damage and lives that had been done over the years. Harrison was speaking as Dexter recalled his wife and sister Debra (Jennifer Carpenter), among others -- despite his code of justification for murdering by reserving it only for those he considered worthy of vigilante justice.
Dexter's girlfriend Angela Jones, the local sheriff, was also there to finish the race. She became the latest to discover his secret and survived where others had failed. Dexter's relationship to her was a reflection of his arrogance, faith, and ability to continue his escape from detection. And, frankly, he would have got away with it all again if he hadn't made the decision to run.
Angela connected Dexter with the Bay Harbor Butcher murders and, thanks to him learned the truth about the missing females in her area. This is quite an impressive feat for any local cop.
This included Angela contacting Angel Batista, David Zayas, one of Dexter’s former colleagues from the Miami police department who had, like everyone else believed him dead.
"New Blood" wasn't perfect, and Harrison's mythological aspects felt a little strained at times. However, Clyde Phillips, the writer-producer, provided a long-deferred sense justice that didn't romanticize the protagonist.
A series that has been running for a long time can leave a bad impression with a disappointing finale. This exercise was meant to erase that feeling.
"Dexter" was not a cash grab in that sense but a way to alter the series' legacy. Mission accomplished, despite some skepticism about the series' first season. It featured Dexter and his "dark passenger", and it was a great ride.