"Dexter" season 8 episode 3 "What's Eating Dexter Morgan" airs Sunday, July 13, 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.

When we last left off in "Dexter" (Spoiler alert for those who haven't watched "Dexter" season 8 episode 2, "Every Silver Lining") Dexter's relationship with Debra had reached a new low when he discovered that she had killed the mob hit man known as "El Sapo." Debra made it clear that the next bullet she fires could very well be for Dexter.

We had also learned that Dr. Vogel was wrong, that she is possible manipulating Dexter into killing off her old patients like Lyle Sussman. It is revealed that Lyle Sussman was not the real "Brain Surgeon," that an unknown person was literally holding a gun to his head and forcing him to kill people. This has major implications for "Dexter" season 8 episode 3 "What's Eating Dexter Morgan."

Showtimes has released a preview of "Dexter" season 8 episode 3 "What's Eating Dexter Morgan" for you to watch online free.

We can see in the preview of"Dexter" season 8 episode 3, "What's Eating Dexter Morgan" (which you can watch online for free), major things are going down. Firstly, Debra is breaking down even more than she already has been. She is seen almost getting pulled over for a DUI and later she screams that she plans to confess everything and expose Dexter as a serial killer.

In "Dexter" season 8 episode 3, "What's Eating Dexter Morgan," Dexter is being pushed away from Debra by Dr. Vogel who openly asks why he never killed Debra. Dexter is later seen preparing a kill room, suggesting that perhaps he has taken Dr. Vogel's advice to heart in season 8 episode 3 "What's Eating Dexter Morgan."

Showtime has released the following two promo clips for what to expect in "Dexter" season 8 episode 3, "What's Eating Dexter Morgan."

The first promo clip for "What's Eating Dexter Morgan" shows Debra getting taken out of her car by a police officer who recognizes her when he finds her passed out drunk with open containers. She asks if he can cut her a break but he refuses.

The second promo clip for "Dexter" season 8 episode 3 shows Dr. Vogel telling Dexter that, when she was forming "The Code" with Harry, she insisted the first rule be "don't get caught," rather than "only kill bad people," as Harry wanted. She then questions Dexter why he never killed Debra after she found out that he was a serial killer in the prior season. Dexter responds that she is his sister and he loves her, Dr. Vogel asks what exactly he loves about her, causing Dexter to stumble in his explanation.

Clearly, "Dexter" season 8 episode 3, "What's Eating Dexter Morgan," will further develop the incestuous relationship between Debra and Dexter. He will also be challenged to kill Debra, the same way he was by his brother the "Ice Truck Killer" in season 1. This gives us more reason to believe that Dr. Vogel is actually Laura Mosner, Dexter's real mother, who somehow survived. We will have to wait and watch "What's Eating Dexter Morgan" online before deciding if the fan theory could be accurate.

Check out more "Dexter" season 8 episode 3 "What's Eating Dexter Morgan" spoilers and watch online free:

'Dexter' Season 8 Episode 2 Review: Is Dr. Vogel The Real Killer In 'Every Silver Lining'? [SPOILERS]

'Dexter' Season 8 Episode 2: When And Where To Watch 'Every Silver Lining' Online Free [VIDEO]

'Dexter' Season 8 Episode 1 Premiere Review: How Does Dr. Vogol Know So Much About Dexter's Past And Where Is Hannah McKay? [SPOILERS]