Theory:Doctor Who television discontinuity and plot holes/The Vampires of Venice


 * In her final scene, Lady Calvieri removes her clothing before throwing herself into the water, however it is clear from when her perception filter malfunctions that the clothes are completely illusory. Master Calvieri similarly removed his cloke and wields a sword, both of which are also illusions. However, the sword hits are felt by Rory and the broom he is using is cut by it.
 * None of the other Saturnians appear to be wearing perception filter generators, which implies that Lady Calvieri's device is shielding all of them, however if Amy' kick damaged her device enough to cause her to blink into her normal form, why are none of the others affected?
 * If the perception filter has a self preservation loophole, then why is Isabella unable to percieve herself being physically transformed into a Saturnian?
 * The Saturnian's aren't vampires, they're fish. So why do they have such a problem with sun, why do they need blood, etc? They explained the reflection, they explained the blood, but they never explained the sun well. The sun may have been drying them out, as we were shown problems with hydration, but why would it burn them?