(The Doctor should never have been anywhere near the Civil Rights era events, there is just some stuff that Doctor Who shouldn't touch when it comes to historical events)
If we forget the past, we're doomed to repeat it.
The show started out as an educational program traveling to different times and events.
It may have been a slow paced episode with Rosa Parks that will fade into obscurity but at least they tried. That's all that counts
The intention was good. The execution was lacking and it looked like Chibnell was just patting himself on the back.
"Yeah! Aren't we daring?! We're being relevant!"