Other mistake: Whenever the gang are in their clubroom (inside the bus), in some scenes the walls wobble when the door is opened or closed.
Other mistake: Whenever you see the gates to the yard during the show they are painted green and have a "Wright and Boston scrap metal merchants" sign written on them. But right at the front of the opening titles of every episode, the gates are plain green with no sign-writing on them.
Other mistake: When the driver of the blue van arrives at the warehouse he is out of the van and walking towards the back door of the van before the brake lights have gone out.
Other mistake: At the end of this episode the gang still sing "see you next week," even though this is the final episode.