Not since Christopher Eccleston’s 9th Doctor has the era of a new incumbent Time Lord been so short. Yes, in some ways, the end of the Gatwa era is not unlike Colin Baker’s 6th Doctor era, both onscreen and off. So, if we only count the serials and not their individual parts, then the 6th Doctor only had 11 distinct stories during his tenure, which lasted from 1984 to 1986. Bizarrely, both of these characters originated in the 6th Doctor era. When the 5th Doctor became the 6th Doctor, Peri (Nicola Bryant) asked him what had happened.