The Doctor was in love once. A woman he could spend the rest of his life with. Another Time lord. He had never loved anyone as much as he loved her. But...one day, the two were separated. They searched and searched, but never found each other. Time Lord Katherine Green, decided that she would continue her travels. Obviously not to other planets or times, due to lack of transportation, but around to other places on modern day earth. While investigating a suspicious High School, she runs into the last two people she thought she'd ever see. The Doctor, and Sarah Jane Smith!

Katherine is dying, on her last regeneration with no hope of finding a way out. She has left her Doctor, in an attempt to save him the pain, and has traveled back in time, to join the Ninth Doctor and old friend Rose Tyler on their adventures. Only here's the twist... Neither Rose, nor the Doctor know that it's her.

You followed them through Love, loss, and their adventures across the stars. And now there back, with new faces, new personalities, and new companions. It's time for a new set of adventures, new villains, and...I guess you'll have to wait and see!

The stroke of nine is long since finished, number ten's is done. Eleven's time is over now, the clock is striking twelve's... They say things get worse before they get better...but in some cases...is that always true? The Doctor has regenerated, and Andrew, getting caught in the regeneration energy of his father, has skipped twelve years of age. Clara is overwhelmed with balancing time with the Doctor and normal life, and Katherine is just tired, frustrated, and all around angry. Will Clara have to choose between real life and time travel? Will the Doctor and Katherine's marriage last?