Remember the Monsters? - S8-E12
Plot hole: A couple episodes prior, Deputy Marshal Clayton stated that he shared Hannah's picture everywhere after receiving a tip that she may be in Miami. In the same episode, Hannah was spotted at a hospital and Clayton was called in about it. This should have only increased public awareness concerning her, but at the beginning of this episode, she somehow made it through airport security and all the way to her gate before spotting Elway and hiding from him in the ladies room.
Are You...? - S7-E1
Plot hole: It's out of character and against his code for Dexter to kill Viktor at the airport. Airports have security cameras everywhere (you can see one on the ceiling when he is wheeling Viktor into the unclaimed baggage storage), and using the unclaimed baggage storage as the kill room is equally unwise, because any airport employee could walk in at anytime and catch him red-handed. Dexter was caught murdering Travis Marshall by Deb just hours before, so if anything, he should be even more cautious.
Scar Tissue - S8-E4
Continuity mistake: When Debra is talking to Jacob Elway, a piece of salad appears on her fork and disappears the next second. (00:31:55)
Continuity mistake: When Dex stabs Lila, the knife goes in near her stomach, where her vest starts. But in the close up shot, the knife is higher up in her, in her chest. (00:48:45)
Continuity mistake: When Dexter and Deb are celebrating her promotion, just before they toast and you look at them from the side Deb has her hands free, when the camera changes she has a crab leg in her hand, and when the camera changes again her hands are empty once more. (00:46:45)
Continuity mistake: Dexter browses the book shelf at Travis' house. The camera pans across, revealing a book titled "Apocalypse Bound" situated at the right on the shelf. When Dexter takes the book off the shelf, it is then shown as the fourth book from the left. When he puts it back, the empty gap where it used to be now appears to the far right on the shelf. (00:25:50)
Continuity mistake: In Season 6, Episode 10, Dexter and Harry are in the motel room where Travis was staying (timestamp 1). Dexter decides to post on Gellar's blog (impersonating Gellar), and the screen on the computer shows the post date as Sunday, November 24, preceded by a Sunday, November 20 post. Aren't Sundays supposed to be a week apart? Then in episode 12 (timestamp 2), Travis is in Dexter's apartment and sees the poster for the Noah's Ark school play. The date posted for the play is Saturday, October 8, ie. in the past compared to the earlier episode. Plus If November 24 were on a Sunday, then October 8 should have been on a Tuesday. (00:09:20 - 00:30:20)
Remember the Monsters? - S8-E12
Revealing mistake: In the flashback scenes when Dexter and Deb are shown holding baby Harrison in the newborn room, you can tell they are just holding a dummy in the wide shots because the baby never moves a muscle.
Continuity mistake: During the opening sequence of every episode, Dexter prepares for his day. The first thing he does is shave and then fixes breakfast. But by the time he starts eating, he already has long stubble.
Continuity mistake: When Rita is talking to Bob outside the house, she is carrying a box. A piece of tinsel keeps moving from hanging over the edge of the box, to being tucked inside.
Other mistake: Doaks says he saw the man's gun and chased him, lots of questions arise about what happened, but no-one mentions how a cop has no right to ask a person about a gun they have on them without probable cause. Doaks has no reason to even go after the guy.
Suggested correction: Florida is not an open carry state, so if the man was displaying a gun, the cop had probable cause to pursue and question. Even if the man had a permit to carry a weapon, per Florida law, that weapon must remain concealed. If the cop could see the gun, it was a violation of the law and the cop could not only question, but arrest him.
Continuity mistake: When Rudy has Debra in a headlock on the yacht, his left hand continuously moves between shots from on her head to gesturing in the air.
Continuity mistake: In Paris, when Dexter grabs the knife off the table in the close-up, he's wearing the black glove on his right hand, but it cuts to the wide shot and both of Dexter's hands are bare; then in the next shot the black gloves reappear. It's rather odd that the actor was even filmed without wearing his gloves in the wide shot.
Hungry Man - S4-E9
Visible crew/equipment: When Dexter rings Arthur Mitchell's doorbell Sally opens the door, and in the next shot facing Dexter, the reflections of equipment and crew, such as one crew member standing on a ladder (appears orange), are visible on the door's glass at the left side of the screen. (00:18:35)
Other mistake: When Deb is dropping Hannah off at the hotel, after she pulls up to the entrance, you can hear her car idling while she and Hannah have a brief chat. When she pulls away after Hannah exits, she starts her engine.
Deliberate mistake: Season eight begins roughly 6 months after the end of season seven. However, at the end of season seven, Harrison is around 3 years old, and season eight has aged him up at least two years.
Deliberate mistake: Whenever Dexter injects somebody with M99, they are immediately rendered unconscious. In reality, this would take several minutes.
Revealing mistake: The dead body appears to be moving its eyes. (00:10:05)
