you had been the doctor’s companion a while ago now. You had decided you wanted a break from traveling the universe, so you could focus on your own life

since you had left the doctor, you had gotten into a relationship that had lasted over a year, only to find out that the person you were dating had found someone else

so, you were doing what any person going through a breakup would be doing. Sitting on the sofa and watching movies, not being bothered to do anything. You had just fallen asleep on the couch when you thought You heard the wheezing noises of the TARDIS coming from outside