We watch "Thin Ice" (Series 10, Episode 3) where the Tardis takes the Doctor and Bill to early 19th century London in order to experience racism first hand in the era of not-yet-banned slavery. Good times... good times... Whilst Bill was rightfully questioning if her appearance would draw attention, the Doctor was wrongfully assuming this episode’s big bad was not of this world. Alas... our baddie was just a regular human rich white racist that knew he was above the law and willing to sacrifice those 'beneath' him for financial gains. Good times... good times...