Theory:Doctor Who television discontinuity and plot holes/School Reunion


 * When Mr. Wagner tells Luke that he has extra class, he is followed by Melissa, not Luke.
 * Luke may have been Melissa's last name. Whether he said Melissa or Luke, she would have followed.


 * At the start of the episode, Lassar assumes bat form to devour a child. He later tells the Doctor that while his brothers remain in bat form, with a morphic illusion giving them the appearance of Humans, his own human form is real, a personal preference.
 * There may have been a second Krillitane in the room. After he closes the door, we lose sight of him. A moment later, the shadow bat-like image is seen through the small window. It cannot be clearly stated whether he transformed into the image, or if it was another Krillitane already in the room.


 * If Sarah was investigating the school, like the Doctor, to discover what was going on after the lights and all the staff being replaced, why was she so openly asking question to the Doctor under his guise as "John Smith". If the staff are all being replaced recently surely meeting a stranger, with an ambiguously genuine name, who had only just started also would ring some alarm bells, yet she very openly starts asking questions suspiciously having only just been totally sycophantic to Mr. Finch.
 * As indicated, this is because he is brand new and presumably therefore less likely to be part of any conspiracy surrounding the headmaster.


 * It's very unlikely that a hundred papers would be flying out after the school blow up, especially ones that aren't burnt.
 * It is quite likely that the heat of the explosion in one area of the school would cause papers in other parts of the building to blow out the windows.


 * How can what appears to be a state school introduce a new curriculum when all state schools have to follow the national curriculum?
 * Exceptions to the rules always exist. On the surface, the school may appear to be following the national curriculum.


 * Why don't the dinner ladies just put a proper lid on the oil barrel before moving it?
 * The oil may have required ventilation.


 * Why does Sarah-Jane have K9 in her car, given that he's non-functional to the extent that the Doctor takes an hour to repair him enough to switch him on. Also, why was K9 in the car rather than the boot the next day when he wasn't even switched on?
 * She was waiting for the Doctor to return.
 * She may have taken him along a bit like a security blanket type thing - making her feel more like the Doctor.
 * If he suddenly switched off one day, it is possible he may have switched on another. If she was in danger and he was not with her, but was working, he would have been no use.


 * When Mickey goes to pull out the plug when the kids are on the computers, before he does it shows the kids and they are wearing headphones but as soon as he unplugs it, it cuts straight to the kids who aren't wearing them any more. There is no way they could have taken them off in a split second from when he took the switch out to it cutting to them.
 * There is sufficient time in between to do so, which they would be likely to do given that there is a strange man there yelling instructions at them.


 * Why does unplugging it from the current cause the router to explode?
 * The router may be of alien technology, given that the program used to crack the code seems alien. Alien devices may work differently.