Who Is New Companion Bill? (documentary)

Who Is New Companion Bill? was a documentary detailing Series 10, it was the first part of a series of documentaries about series 10 of Doctor Who.

Main subject
Peter, Pearl and Steven talks about Bill Potts being a very different and very new kind of companion who ask the questions no one ever asks.

People interviewed

 * Peter Capaldi
 * Pearl Mackie
 * Steven Moffat