Theory:Doctor Who television discontinuity and plot holes/The Doctor Falls


 * How were the rifles upgrades? And if every rifles was upgraded, so why wasn't Bill destroyed when she was shot at by accident?
 * The rifles weren't upgraded. It was just Nardole hacking the spaceship and exploding parts of it. The rifle shot was a deception, to fool Cybermen into believing humans have serious weapons.
 * Why didn't Nardole just blow up parts of the ship that contained Cybermen?


 * Did something happen to the programming of the Cybermen, cause, I thought they only went after "humans" with 2 hearts!
 * The definition was expanded to include humanoids with two hearts. So they were still heading after normal humans too. Better question, could Nardole still have went down there safely and reprogrammed the computer to discount all humanoids from their protocol? They weren't targeting him before so unless he happens to have two hearts, it's unlikely the Doctor's upgrade would have included him too.