Theory:Doctor Who television discontinuity and plot holes/Silence in the Library


 * When standing on the balcony upon entrance, the Doctor remarks on how, being near the equator, they must be in or near the Biography section, though when the screen pans down, a Traffic sign can be seen with a marking to the left with the Words Xenobiology.
 * It also had "Art" underneath it, both with arrows pointing to the left. However, think of how many famous xenobiologists and artists there would've been by this time, certainly enough to warrant it's own directory.


 * At the beginning when we see the Doctor and Donna enter the room from the little girl's point of view we see the door is kicked multiplied times before they enter however when we see it from the Doctor and Donna's point of view we see Donna kicks it once before entering.
 * The Doctor tries to open it without the Sonic Screwdriver before Donna kicks it open.


 * The keyboards on the computer terminals in the library are, in fact, the latest incarnation of Apple Computer's Bluetooth keyboard.
 * A similar design obviously was in use in the 51st century.


 * Despite the Doctor stressing to the entire team about not staying in the shadows, all but one are standing blatantly in the shade when talking to the already-dead Miss Evangelista. This is revealed from a downwards shot on the team, with the ray of light almost completely neglected as protection. ::The Doctor later states that the Vashta Nerada are not necessarily in every shadow, but it is possible for them to be in any shadow.


 * The Doctor receives a message on the psychic paper which shows up and he shows it to Donna. Donna takes it from him and shows it to him but it is now blank.
 * This has happened a lot of times on the series, and can be interpreted as a feature of the psychic paper


 * After Proper Dave has been turned into the suit creature, the green lights on his comm system are no longer on, even though Dave's Data Ghost is still talking.
 * The vashta narada are learning to use his voice, making it unclear if it is really still his data ghost at that point.


 * How does River Song recognise the Tenth Doctor? The Tenth Doctor changes his appearance to the Eleventh Doctor. River does mention that the Doctor's appearance is 'young' but not different, and has to ask what point he was at in his personal timeline, indicating that that he looked like the Tenth Doctor at least for the crash of the Byzantium (which occurs in an Eleventh Doctor adventure) and the picnic at Asgard.
 * If she knows the Doctor as well as she says she does, River Song may know that Time Lords can change their appearance (she may have even seen the Eleventh Doctor regenerate) and would know to recognize him by other means than by looks. As for not recognizing his appearance in the past, she might have forgotten what face he had, the same as we might forget what clothes or hairstyle someone had at a particular time. In The Time of Angels River states she has photos of all the Doctor's incarnations.
 * Steven Moffat stated in the commentary that she had met the Tenth doctor again later in his personal timeline. The Eleventh has not stated anything to contradict it. She most likely does not have pictures of all the Doctors, probably only the ones that come after the Tenth, and most likely does not know what order they go in.
 * Though as Flesh and Stone shows, it may be dangerous to make assumptions about River based on what we know about her so far.


 * Related to the above: given that the Doctor and River keep encountering each other out of order, how would the Doctor have known what was to be River's next-to-last meeting with him before the one that led to her death, in order to be all moody about it and to give her the sonic screwdriver? It could be their very next encounter, or could take place years or decades into the future of the Doctor's personal timeline.


 * The message on the psychic paper doesn't say the time or date that the Doctor should land in the Library so how does he manage to arrive a few minutes before River Song arrived? Additionally how does he know to land in the section that she will arrive in?
 * Given the technological capabilities the TARDIS has previously shown, its a reasonable assumption that he would have been able to trace a rough time and place of the message. It may simply be a feature of the paper to take the Doctor near to the time which the message was sent. Take, for instance, the Face of Boe's message causing the Doctor to arrive just before the breakout of the New Humans in New Earth.


 * Why doesn't River Song close the square with the Sonic blaster like Captain Jack did in DW: The Doctor Dances?
 * According to Jack, special features wear down the power cell... one could assume that the special feature he was referring to was re-closing previously opened squares, since River makes a lot of openings, but Jack only managed two openings and two closings before the gun gave out.