In this new episode, Doctor Who (now played by Jodie Whittaker) and her companions go back in time to the 17th century, and gets involved in the witch trials. Which witch trials? Good question, though an awkward one. In this instance, the good Doctor isn’t traveling to Salem in our country, but to Lancashire back in the U.K. – which allows Alan Cumming to guest star as a very foppish King James I.