Theory:Doctor Who television discontinuity and plot holes/Cold Blood


 * This story contains a several time paradoxes: If Rory was wipped from time, so he never existed, then who saved the Doctor? Rory was only absorbed by the crack because he died, but if he never existed then he would never have died, so how was he absorbed? If he never existed who convinced them to take Alaya's body down to the Silurians? Who saved Amy from Fancessco? Who convinced Abrosos to trust the Doctor? Who helped the Doctor capture Alaya in the first place?
 * The events prior to Rory's absorption is re-written. Many of the other characters could have taken Rory's place. Events may have also been unwritten or rewritten. As for each question; 1) the Doctor may have simply destroyed the gun as he was about to do with his sonic screwdriver, b, no wait, 2) that's part of the cracks and their mysteries, 3 or c) if Rory wasn't alive she may not have died so they may have taken her down. 4) Amy wouldn't have been there in the first place, e) Amy? She can be pretty convincing, and f (for finally)) Ambrose or her dad could have easily taken his place.
 * It should also be noted that the events in the past being erased do not affect the situation of the present, especially within something displaced in its normal spacial-timey-wimey co-ordinates. Such an example would be Amy's engagement ring.


 * When the Doctor is pointing his sonic screwdriver at the Silurians, he is pointing it straight at them; from a different angle, it is pointing toward the ceiling.
 * This is almost certainly a production error, not a discontinuity.


 * How come the Doctor didn't get erased from time when he touched the crack?
 * It took some time for Rory to get erased. And presumably absorbing a "complicated time-space event" like the Doctor is a lot harder than absorbing Rory. And you could see and hear that the Doctor was struggling with something the entire time his hand was in the crack (unless Matt Smith was just doing a 2nd Doctor impression for no reason).


 * The Doctor tells the Silurians to wake up in 1000 years. However by that time, humans have evacuated the earth due to solar flares.
 * That could be intentional--let the Silurians have the planet, no conflict necessary (assuming the Silurians can survive the flares even though humans can't).
 * That would make the narration at least a little odd.
 * It's also more devious than what we've come to expect of the 11th Doctor (although for, say, the 7th, it would be perfectly in character).
 * Yeah, shouldn't the Doctor tell them to wake up sometime later than that, since when the humans eventually return to Earth only to find it in control of the Silurians, there would probably be a war.