Theory:Doctor Who television discontinuity and plot holes/Revolution of the Daleks


 * There's a chance this may be more a production error but; when the Doctor notices Jack in the penn next to her, she runs over to him and clearly puts her hands on the electrified bars without being zapped.
 * How did no one on Earth seem to have heard of a Dalek, even though the Earth was invaded by the Daleks in The Stolen Earth (TV story)?
 * Those events were erased when the universe reset in The Big Bang (TV story).