The time was confirmed just over half an hour ago - at 2.34pm GMT - by the BBC One Facebook page.
This now finalises things for the global simulcast and cinema screenings and means, for example, that it will start at 11.50am the same day in Los Angeles and at 8.50am the next day in Auckland.
UPDATE - 4.35pm GMT: BBC America has since confirmed that it will be showing the episode at 2.50pm ET on 23rd November, and the Canadian channel Space has confirmed that its commercial-free simulcast will also begin at 2.50pm ET that day.
