Corrected entry: Travis is revealed to be imagining Professor Gellar and it was actually him who was the sole DDK. Although it's a great plot twist, it doesn't make sense since in the last episode, while Travis and Dexter are together in the car outside the University, Dexter sees Gellar walk into the building. I believe Dexter even acknowledges seeing him when he says "Gellar."
Corrected entry: In the scene where Dexter and his sister find the ice truck parked on the side of a busy road, you can see that the truck is a side loader, meaning it has doors on the sides. This is also the truck that Dexter saw in episode 1. This truck however turns into a back loader in the next shot when they enter the truck. They roll up the door and go in the back, even though the truck does not have a back door.Also about the truck, Dexter says that it is running to keep the back refrigerator cold, however this type of unit plugs in at night to cool it down and the metal plates inside keep it cold not the engine.
Corrected entry: If the police pulled Doakes' fingerprints from the gas after the explosion, wouldn't they have found Lila's too? Also, you never hear about Lila from the police again. Don't you think after Deb kicks her out of Miami and then finds out she burned the place down that they would have tried to find her? Especially if her prints were in the cabin.
Corrected entry: Deb's boss hands her a water bottle infused with some nutrients to counteract her hangover which she is shaking in her right hand when Dexter comes into the room. When Deb gets up to leave with Dexter, she no longer has the water bottle, nor is it on her boss' desk. It has disappeared.bnemirow
Corrected entry: After Dexter kills Arthur Mitchell and drops him in the ocean there is a flashback. You can see Dexter, Rita and the kids celebrating Harrison's first birthday in their backyard (there is a 1 on the cake). In season 5 however, we learn that Harrison is only 10 months old, and at the end of season 5, Harrison celebrates his first birthday at the beach in Miami.
Corrected entry: In episode 7 of season 1, Doakes tells Debra she's just caught the worst serial killer in Florida history. At the time, the killer in question, the Ice Truck Killer, was blamed for four slayings. Ted Bundy confessed to 30 murders (albeit not all in Florida), while the "Gainesville Ripper" was convicted for five murders.
Corrected entry: Dexter is in the hospital and the doctors say there are complications because he has lost so much blood. Later, it is revealed he has a very rare blood type, AB-. It is true that this is the rarest blood type in most populations but I remember learning that AB blood types are the "universal acceptors" because they have no antibodies and can therefore accept A or B type blood. Of course it is preferable to give him the correct blood type but if it was really urgent shouldn't they give him any blood he could accept?