​Jo Martin Appeared as the First Black Doctor on 'Doctor Who'

​Jo Martin Appeared as the First Black Doctor on 'Doctor Who'
Jo Martin has appeared as the first Black Doctor on long-running British sci-fi show Doctor Who.
 
Martin appeared in last night's (January 26) episode, alongside Jodie Whittaker, who currently portrays the series's first female Doctor. Martin isn't necessarily taking over Whittaker's role, though.
 
The casting was unveiled in the latest episode, "Fugitive of the Judoon." Martin appears as Ruth Clayton, who is dramatically revealed to be a past Doctor.
 
"You're in my future, not the other way around," she tells Whittaker's character, the 13th Doctor.
 
Full details of Clayton's story and how she fits into the show's timeline have yet to be revealed.
 
Nevertheless, the arrival of a Black actor playing a Doctor has been received well by many fans on Twitter.
 
See some of their reactions below.