Theory:Doctor Who television discontinuity and plot holes/Bad Wolf


 * The station is masking the Dalek fleet from sonar, which is entirely useless in space as a vacuum cannot transmit sound.
 * Maybe a way to transmit sonar through space had been discovered. Also, sound can travel through space as it is not a perfect vacuum.
 * Sonar, being an acronym, could stand for some other means of detection in this time period such as Space Omnidirectional Navigation And Ranging.


 * Why is Jack's Laser Gun compatible with the defabricator? The laser gun is presumably from the 51st century, and the Defabricator is from the year 200,100. How can the defabricator be compatible with technology from 195,100 years earlier?
 * Jack is a time agent. His weapons might be more advanced than defabricator. Because, in year 200,000 it was implied that humans are still not capable of time travel, yet Jack already possess vortex manipulator in 51st Century.


 * The Doctor states that the Jagrafess was installed a hundred years ago, when it was actually installed 190 years ago.
 * The Doctor may have been referring to the fact the Jagrafess was there 100 years ago, not that that was when it was first put in.


 * If no one has a garden, why is there a Groundforce show?
 * Because it was a show about turning people into compost more than actual gardening.
 * The statement "no one has a garden" could just mean no normal people and just very few rich people have one. Given the Doctor's plain clothes, it would not be wrong for Lynda to think the Doctor was not rich.


 * The Doctor states that the Daleks have only two emotions hate and fear, but in the past they have shown more than those.
 * From fear and hate many different emotions can be created, though not as strong as the original ones. Hatred of something generally also brings the feeling of anger about it.


 * The Doctor said there were 200 Dalek ships and 2000 Daleks in each meaning there are 500,000 Daleks in total. But 200 multiplied by 2000 is only 400,000.
 * There are 200 normal ships and the Emperor's ship. So there are 400,000 Daleks overall on the 200 ships and the Mother ship which is much bigger contains 100,000 Daleks.
 * The Doctor mentions there are "more than 2000 on board each one" and that there are "just about half a million of them", mean less than 500,000. Also, it is unlikely that every ship has precisely 2,000 Daleks on board.


 * With at least 40 000 channels, why would Lynda assume the Doctor had been watching her?
 * Maybe the people in this time just watch horrendous amounts of TV.
 * Its more likely that in the excitement of mysteriously getting a new roommate she didn't realize that the Doctor won't have seen her.


 * How does Jack know that the two hearts mean The Doctor? It could've been two people.
 * His device must've been clever enough to show the difference between one person with two hearts and two people with one heart each.


 * It was stated that a food came from the planet Lucifer, but in the book Lucifer Rising where said planet was introduced, it and its surrounding space was permanently sealed off from the rest of the universe, so how could there be a food exported from there?
 * Maybe there's another Lucifer.


 * At the beginning of the episode it is stated that the Doctor is on channel 44,000, but later in the episode Lynda tells the Doctor that there are 10,000 channels.
 * Here in Australia, we have channels spanning from 01 to 99 (with radio channels on 101, 102, 103, etc.), but not all of those channels are used. For example, 67 doesn't exist, and some channels have different numbers (one channel has 72 and 73, for example). So, it's not entirely far-fetched to assume that while there are 10,000 channels, a lot of those channels between 0 and 44,000 are dead-air or redirect to another channel, leaving only 10,000 or so channels that do actually show something