Theory:Doctor Who television discontinuity and plot holes/The Sea Devils


 * It is stated that the renovations being carried out on the sea fort are what is responsible for this particular colony of Sea Devils being awakened. However, surely the original construction of the fort would have been just as likely to awake them, if not more so, since laying the structures foundations underwater would have created an even greater disturbance.
 * That depends what the renovations were, how they impacted the surrounding area, etc, in relation to the location of the Sea Devils colony.


 * The clock in the Master's prison moves backwards.
 * Perhaps the Master was board and messed with the clock to amuse himself.
 * And one could guess this is deliberate, a reflection of the Master's perversity.


 * In episode 6, why does the Master wait before turning the Doctor's machine off?
 * The Master is not known for being particularly considerate to the pain and misfortune of his allies.


 * Why don't the Sea Devils shoot the escaping submarine?
 * The Doctor is on board, and the Master has, by this stage, realised that he will need his help to repair the faulty hibernation revival mechanism.


 * Considering that the Master has cold-bloodedly killed more people than Hannibal Lecter, intended to kill a good many more, has earned a place on international wanted lists (cf. The Claws of Axos), and is also wanted by the Time Lords for stealing information from the Matrix; the decision to incarcerate him in a luxurious prison facility, run by an idiot, and with no apparent observation or security backup from either UNIT or the Time Lords, would seem to say the least rather peculiar.
 * The Master's crimes are unprecedented, and thus the fitting punishment is hard to determine. The authorities believed that they had him well-secured, they simply underestimated his cunning and abilities.
 * Also, UNIT didn't exactly have a connection to the Time Lords to ask for their assistance and were never depicted at this time as an exceptionally large organisation which could offer a lot of support to a prison. Besides, from a practical position the location makes sense. The Master had to be kept somewhere away from other prisoners, otherwise he could hypnotise them and use them to escape. It was a actually quite sensible to have him in some small prison, away from people, with a bunch of guards who could be trained to resist his hypnosis.


 * The Doctor attempts to attribute the misnomer Silurian to their discoverer. However in Doctor Who and the Silurians, Quinn, the man who first contacts the 'Silurians' never names them. He refers to them as 'they'. It is the Doctor who asks one of them, 'are you a Silurian'? The Doctor deduces from Quinn's notes that the creatures come from the Silurian Period and so names them such.
 * Although Quinn never names them on-screen, the Doctor does indeed read Quinn's notes, which make 'particular reference to the Silurian era.' He shortly later asks one of the creatures 'Are you a Silurian?' It is a reasonable conclusion (supported by the explanation given in this story) that Quinn had referred to them as 'Silurians' in the notes which the Doctor read.


 * Why in heaven's name would there be a small arsenal of fencing equipment outside a prison cell?
 * It was an old fort, with corresponding aesthetic choices (likely chosen by Trenchard, who was working for the Master).