Theory:Doctor Who television discontinuity and plot holes/Father's Day


 * If Rose can remember Jackie telling her about the blonde girl who was by her father's side when he died, that means it is impossible to change the past because the past changes would have already taken place which contradicts many Doctor Who episodes.
 * Rose's memory changed when the past changed. Previously she remembered Jackie telling her that no one was with Pete when he died.
 * Yet, Amy Pond still remembers the clerics and the Weeping Angel that got in her head after they were entirely removed from time in DW: Flesh and Stone, and the Doctor tells her that being a time traveler changes the way you experience time (implying that it makes their memories immune to changes in the timestream).
 * The Doctor later, in DW: Cold Blood, states to Amy as she is trying to remember Rory that memories are not 'immune' if one's own timestream is directly affected, which Rose's was by her father's death and her involvement in it.


 * When the Doctor is about to be eaten by the Reaper, Rose shouts "Doctor" then it cuts to a wide shot of The Doctor and the Reaper, notice that the shadowy TARDIS thing is gone.
 * The Doctor loses concentration when the Reaper was about to eat him, so the TARDIS must have been affected by this.


 * In the church scene the doctors sonic screwdriver goes off without making a noise.
 * Silent setting? it has been shown that the sonic screwdriver changes pitch depending on the setting. it is possible that this setting is at a range of sound that cannot be detected by human ears.