The Doctor is doing, the same as always. Traveling. For now, he's traveling with the young lady Valerie Whales. But one day, something happens. Valerie's memory has changed. Changed into something sad, ands dark, and she doesn't remember how it ends. Valerie who in her teenage years were the popular girl at her school, and prom queen. Valerie who works at a daycare. Valerie, the beautiful girl, who the doctor chose to travel with, now have a memory, of herself standing, with a handful pills in her room, and she doesn't remember how it ends...
Young Valerie is from 2015, and adult Valerie is from 2023.
I decided that I wouldn't mess with any of the real doctors, so this is (My idea of) the 13'th Doctor