The last season of Doctor Who flipped the titular Time Lord’s script, upending the 13th Doctor as she learned shocking truths about her homeworld, her entire species, and above all, herself. But one of those shocks—the existence of a renegade past-self beyond any of the incarnations she knew about—has a lot more story…
Source: io9 – Doctor Who’s Jo Martin Reflects on the Power of Being a Black, Female Doctor