By Paul Cornell
“I did it again. I picked another stupid ape. I should've known. It's not about showing you the universe. It never is. It's about the universe doing something for you.”
Rose asks The Doctor to take her back to November 7th 1987 the day that her Dad died. She wants to be sure he doesn’t die alone like the way he does in the story that Jackie tells. At first Rose gets cold feet and she just watches him die and asks The Doctor if she can try again. Against his better judgment he reluctantly agrees and they go back to that fateful moment. But it doesn’t go as planned.
Rose changes her mind and runs out and saves her father from getting hit by the car that takes his life changing history and making The Doctor extremely angry. The web of time has been affected and serious consequences could happen. The Doctor decides to leave Rose in 1987 but when he gets back to the TARDIS it is nothing but an ordinary Police Box. Something devastating has happened as deadly Reapers start appearing out of nowhere killing people. You see while Pete Tyler lives Earth is destined to be destroyed and The Doctor must come up with a plan to save the Earth from Rose’s stupid mistake at the risk of hurting his young companion.