File:Doctor Who Extremis - Series 10 Episode 6 Trailer - BBC One

Description
Programme website: http://bbc.in/1UFcb1w In the Vatican’s secret library there is an ancient book known only as The Veritas. Throughout history, anyone who has ever read it has immediately taken their own life. Now a new translation is online, and the danger is spreading. Will the Doctor read The Veritas? But can even the Doctor survive the ultimate truth?