- Actor Allusion:
- Michael C. Hall previously played a funeral home director on Six Feet Under. So when Dexter goes to a funeral home in the season 5 premiere, and the roles are reversed, the show makes the most of it, from a set that looks like the Fisher funeral home to the director offering tissues.
- Enver Gjokaj guest stars as a character named Viktor, possibly a reference to his role as Victor in Dollhouse.
- Author Existence Failure: Narrowly averted in 2010, when Michael C. Hall won a nasty fight with cancer.
- Cast Incest: Michael C. Hall (Dexter Morgan) and Jennifer Carpenter (Debra Morgan) were married for a couple of years while playing adopted siblings. They were divorced on December 2, 2011.
- Chuck Cunningham Syndrome : Season 5's nanny, who was part of a minor subplot of Dexter trying to balance work, his obsession, and being father to a toddler. She's last seen at Harrison's birthday party. In Season 6, Batista's sister has taken the job.
- Executive Meddling: Showtime execs refused to let the show end with Dexter's death. So there's who to blame.
- Fake American:
- Fake Nationality / Fake Ethnicity:
- Puerto Rican Lauren Vélez as Afro-Cuban-American Maria LaGuerta.
- Puerto Rican David Zayas as Cuban Angel Batista.
- Korean-American C.S. Lee as Japanese-American Vince Masuka.
- Mexican-American Christian Camargo as (presumed) white American Rudy Cooper / Brian Moser.
- Fake Russian: Irishman Ray Stevenson as Ukrainian Isaak Sirko.
- The Other Darrin:
- Cody was played by Daniel Goldman in Season 1, and by Preston Bailey from Season 2 onward.
- Taken Up to Eleven with Harrison: he was portrayed by Brandon Michael Bass in Season 3 (during an Imagine Spot), by several uncredited babies in Season 4, by twins Luke and Evan Kruntchev from Seasons 5 to 7, and by Jadon Wells in Season 8.
- Stunt Casting: From Season 3 onward, moderately big names are brought in to play major recurring characters.
- Jimmy Smits in Season 3.
- John Lithgow in Season 4.
- Julia Stiles, Jonny Lee Miller, and Peter Weller in Season 5.
- Colin Hanks, Mos Def, and Edward James Olmos in Season 6.
- Ray Stevenson and Yvonne Strahovski in Season 7.
- Charlotte Rampling and Yvonne Strahovski (again) in Season 8.
- Trolling Creator: The show seems to go out of its way to make things as uncomfortable as possible for Michael C. Hall and Jennifer Carpenter by ramping up the levels of Cast Incest after their real-life divorce. Probably the only case of the creator trolling the cast instead of the audience.
- What Could Have Been: After the series finale aired, an interview with former showrunner Clyde Phillips (who stepped down after Season 4) revealed how he would have ended it:
"In the very last scene of the series, Dexter wakes up. And everybody is going to think, 'Oh, it was a dream.' And then the camera pulls back and back and back and then we realize, 'No, it's not a dream.' Dexter's opening his eyes and he's on the execution table at the Florida Penitentiary. They're just starting to administer the drugs and he looks out through the window to the observation gallery. And in the gallery are all the people that Dexter killed—including the Trinity Killer and the Ice Truck Killer (his brother Rudy), LaGuerta who he was responsible [for] killing, Doakes who he's arguably responsible for, Rita who he's arguably responsible for, Lila. All the big deaths, and also whoever the weekly episodic kills were. They are all there. That's what I envisioned for the ending of Dexter. That everything we've seen over the past eight seasons has happened in the several seconds from the time they start Dexter's execution to the time they finish the execution and he dies. Literally, his life flashed before his eyes as he was about to die. I think it would have been a great, epic, very satisfying conclusion."
Trivia / Dexter
Trivia for the series Dexter: