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 has been discovered. Also, sound can travel through space- it is not a perfect vacuum. Also sonar, being an acronym, could stand for some other means of detection in this time period such as Space Omnidirectional Navigation And Ranging.


 * The Doctor states that the Jagrafess was installed a hundred years ago, when it was actually installed 190 years ago.
 * The Jagrefess would have been installed before the Doctor arrived a hundred years before this episode is set.) (The events of The Long Game took place in 200,000.


 * 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 or the statement no one has a garden could just mean no normal people just the richer of the population.


 * The Doctor states that the Daleks have only two emotions hate and fear, but in the past they have shown anger, revenge, smugness, lust and sadism which by my calculations is seven.
 * The Doctor is prejudiced in his way of thinking about the Daleks and also they may have changed in the Time-War - can you reference when they have actually shown these emotions too.''


 * The Doctor said there were 200 Dalek ships and 200,000 Daleks in each meaning there are 500,000 Daleks in total. But 200 multiplied by 200,000 is only 400,000.
 * 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 200,000 Daleks on board.