@tardis I would have liked there to be more of a story made around Yaz and the Doctor's feelings for one another. When they eventually spoke about them, it was almost a non-event. The time they spent together just before the Doctor regenerated was all the more poignant because we knew how they felt. Early on in Thirteen's episodes when the she had to check whether she was dating Yaz, it seemed to me that there would eventually be an engaging story built up around their relationship, but it sort of fell flat.