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. (00:19:45)
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?