Dexter Season 8, Episode 11 ("Monkey in a Box") is the penultimate episode of the season and the Showtime series as a whole. Next week, viewers will say, "Good bye, Dexter Morgan. Good bye, Debra. And thank you for a great show." But first, the show tackles what could possibly become Debra's doom - Oliver Saxon, the Brain Surgeon.

Spoiler Alert: This feature contains spoilers. Read at your own risk. Heads up, this is about the final two episodes of Showtime's Dexter.

"Two days left in Miami," Dexter (Michael C. Hall) is heard saying in the sneak preview of Dexter Season 8, Episode 11. In "Monkey in a Box," Dexter Morgan, Harrison Morgan (Jadon Wells), and Hannah McKay (Yvonne Strahovski) are headed for a new life in Argentina. But if this Reddit series finale spoilers are accurate, things will get messy and massively tragic before dust settles for these three.

A storm is coming. Dexter has to move with masterful precision if he wants to keep Hannah McKay out of danger. He loves the poison goddess so much, that he's leaving sister Debra (Jennifer Carpenter) for her. Debra, the one person with whom he can associate the word "love" back in the Season 1 pilot episode - eight years ago, will be left with Quinn (Desmond Harrington).

Daniel Vogel aka Oliver Saxon (Darri Ingolfsson), the Brain Surgeon, comes to Dexter's apartment. (Scroll down to watch the Dexter Season 8, Episode 11 sneak peek.) Between the two psychopaths, Dexter has more to lose. Such is the case after Oliver slit his own mother's throat before Dexter' eyes.

Oliver Saxon lets Dexter leave - as long as he does not bother the Brain Surgeon again. It is likely for positively distracted Dexter to take the bait. The question is: How will Dexter's choice affect his sister Debra Morgan?

Dexter Season 8, Episode 11 sets the tone for the series finale next week. There are spoilers about Dexter killing Debra Morgan because she knows too much. This is not plausible and goes against everything that's been established about the Morgans. The Psychopath Whisperer, Dr Evelyn Vogel (Charlotte Rampling), would rise from her grave if this happens. But Debra is likely to die, anyway.

In this IB Times AU report, Jennifer Carpenter said she's played Debra Morgan from start to finish. Take that with the Reddit spoiler mentioned above, and you've got Dexter series finale figured out. Here's a tip: Watch Quinn very closely.

Dexter Season 8, Episode 11 airs Sunday, Sept. 15 on the U.S. cable channel, Showtime. Check out the slideshow to see what Dexter fans are posting to Tumblr.

Dexter Season 8, Episode 11: 'Monkey in a Box' Sneak Preview

Read More 'Dexter Season 8' and TV Celebrity Guide Features:

Dexter Season 8, Episode 10 Spoilers: 'Goodbye Miami,' Top 5 Things to See Before It's Goodbye, Dexter Morgan [PHOTOS]
Stephen Amell Disses the Emmy Awards 2013 for Snubbing The CW's 'Arrow' Stunts [PHOTOS, VIDEOS]
Matt Bomer, Alexis Bledel Get 24 Thousand Signatures for Christian Grey, Anastasia Steele Recasting Petition [PHOTOS]

Argentina Storm