When Dexter takes his blood trophy with the pipette off Benny's jaw, the pipette is clearly empty. Nevertheless, in the next cut, there's a drop of blood on the glass slide.
As Dexter is preparing to kill a victim he is on the phone. He is holding first his right hand on the victim's mouth, then as camera changes it is his left hand on the victim's mouth. It alternates a few times.
Previously, Dexter drove a Ford Escape. Here he is shown driving a Kia Sportage. It's possible that he changed SUVs but at 18:50, it's clearly a shot of him driving the Ford again (clear from the vehicle's center console shown that belongs to the Ford), but then back to the Kia again.
Vicky Noonan was born on November 12, 1957 and murdered on April 11, 1979, when she was 21. Her file, however, lists her age as 22.
When Debra and Anton are talking in bed in the morning the sheets start out green with a plaid pattern but then a few shots in there is one shot where the sheets are a plain flat blue and then they switch back to the green color.
Dexter says that the boxing arena is the place that "Florida Electric forgot." No one raised in Florida would say anything other than FPL (Florida Power and Light).
Debra complains when she can't get bottled water for her coffee; but then adds water from the tap (yellow) to the coffee maker.
Debra was annoyed that she couldn't use the filtered water, and was forced to settled on the tap. The discoloration was simply a result of leftover coffee still in the pot.
When Dexter is in the ring with Benny waiting for him to wake up he is struggling to stay awake. He starts to warm up like in a boxing match, as he does this the Benny wakes up desperately, and in the next cut he is laying down still asleep.