Showtime's popular series Dexter has a famously hated finale, and many viewers were under the impression that Dexter's death would've been a more fitting end to the show — but there's a frustrating reason it didn't happen that way. Dexter ran for eight seasons on Showtime, seeing the ups and downs of the moral-code-driven secret serial killer and blood spatter analysis expert Dexter Morgan (Michael C. Hall). Dexter went through a lot in the series, finding a fulfilling romance with Rita (Julie Benz) and having their son Harrison before she was murdered by the Trinity Killer (John Lithgow), and Dexter was forced to forge his own path.