Showtime told Dexter writers they couldn't kill Dexter, forcing them to go with only other possible ending
While everyone left the Dexter finale satisfied—having at last seen the story of a serial killer who’s secretly working inside a police station reach the conclusion it had been naturally building toward for eight seasons, by having everyone inside that police station still think Dexter’s awesome while he goes off to become a lumberjack—it turns out this was just one of several endings the show could have had, some of them possibly not even involving lumber. Vulture spoke to Dexter executive producer John Goldwyn, who revealed that in the writers’ room “there were a lot of endings discussed because it was a very interesting problem to solve, to bring it to a close.” But there was one solution that Showtime did not find as interesting or as fitting a climax as Dexter sailing into a hurricane on his boat, then emerging on the other side with a beard.