"Dexter" season 8 episode 7 "Dress Code" airs Sunday, August 11, 2013 at 9 p.m. If you can't watch the episode Sunday night, you can visit the official Showtime site for free the night after the episode airs and watch the entire episode online free.

(Warning: "Dexter" season 8 episode 6 spoilers "A Little Reflection")

When we last left off in "Dexter" season 8 episode 6, Dexter has killed the "Brain Surgeon" and by all indications everything should go back to normal. He tried to date the girl that Jaimie sets him up with and drives her away because of his awkwardness. He follows it up by having an equally awkward dinner of steaks and beer with Debra. However, Dexter still hasn't let go of the fact that he suspects Zach Hamilton killed Norma Rivera.

In "Dexter" season 8 episode 6 we see Dexter and Joey (after he gets turned down for the Sergeant job) stalk Zach Hamilton to see what he is up to. After Dexter gets Joey sent back home he find Zach preparing to kill his father and knocks him out and takes him to his table. After strapping Zach to his table and preparing to kill him, Dexter has second thoughts based off some of the things that Zach said that make it sound really similar to what Dexter went through as a child. He decides to honor Dr. Vogel's request to teach Zach Hamilton the code and lets him go.

Later when Dexter is with Debra again, she passes out unconscious alarming Dexter, which is when we get a massive cliffhanger when Hannah McKay appears, indicating that she has drugged or poisoned Debra.

(Warning: "Dexter" season 8 episode 7 spoilers "Dress Code")

Showtime has released a preview of "Dress Code" for you to watch online free. In the online promo we can see a new major plotline opening up. Dexter wants to kill Zach after he learns that he is responsible for beating a woman to death. However, to his shock, he discovers in "A Little Reflection" that Dr. Vogel is secretly training Zach in Harry's code. Vogel tries to rope Dexter in to help her in season 8 episode 6, but he doesn't seem very enthused about it.

watch, dexter, season, 8, episode, 7, online Credit: Showtime

The preview reveals some major "Dexter" season 8 episode 7 spoilers. In the first video we can see Debra demanding that Dexter kill Hannah McKay in "Dress Code" showing she wasn't poisoned. Later we see Dexter demanding to know why Hannah has returned to Miami, she replies that he had better leave before her husband returns. Hannah has been married before and murdered her husband in the past. Could she have the same planned this time?

We also see some shocking events that may take place in "Dress Code", there is a scene where Dexter is mentoring Zach Hamilton, he tells Zach that he can control his urges and that he needs to be patient for Dexter to teach him. However, we can see that Zach is having a difficult time adjusting to this and he clearly cannot suppress his urges. We see him desperately knocking on Dexter's door attempting to seek help when Cassie (Dexter's neighbor who he dated), opens the door and tells Zach that Dexter isn't home. We can see from the murderous glare that Zach gives her that he's planning to kill her. If Zach kills Dexter's neighbor that could have dire consequences for Dexter in season 8.

In a major "Dexter" season 8 episode 7 spoiler we get the impression that this coming episode will herald Dexter's downfall. The first proof of that is that in the previous season we see that Harrison has kept the blood stained teddy bear that ties Dexter to a murder under his bed. Dexter allows Harrison to keep it and doesn't throw it away. The next problem is that Dexter has taken Zach Hamilton under his wing. Dexter may see himself in Hamilton, but Zach is still young and reckless, much as Dexter was when he was younger. Zach will make mistakes, like killing Cassie and that could link directly to Dexter. Lets not forget that Dexter's past love Hannah is also back on the scene. And when talking about loose ends in Dexter's life, there's also Lumen who could reappear to stir things up (though that's a more distant prospect).

We will have to wait and see if our season 8 spoilers are proved correct and how things will shake out for Dexter, Zach and Hannah. In the meantime you can watch "Dexter" season 8 episode 7 "Dress Code" online free on the Showtime official site.

Check out more "Dexter" season 8 episode 7 "A Little Reflection" spoilers and watch online free:

Watch 'Dexter' Season 8 Episode 6 Online: Will Zach Be Taught 'Harry's Code' In 'A Little Reflection' ? [VIDEO]

Watch 'Dexter' Season 8 Episode 5 Online: How Will Dexter React To Debra's Murder-Suicide Attempt In 'This Little Piggy'? [VIDEO]

Watch 'Dexter' Season 8 Episode 4 Online: Will Debra Be Cured In 'Scar Tissue'? [VIDEO]