The fact that some people are praising this episode rubs me the wrong way. Aside from the terrible accents and writing, this episode belittles the whole American civil rights movement. It was clearly written by Brits who know nothing more about the South or Jim Crow era racism than what they could immediately Google. There are some things that writers simply shouldn't touch. Mainstream TV has enough black traumas portrayed- keep them out of Doctor Who. There's other ways to combat racism in TV messaging.