DoctorDoctor Who Guide
Last updated 25 May 2017



Series Episode Number: 833

World Premiere: Sat 20 May 2017 - 7:25pm BST [BBC One] (United Kingdom)
First Broadcast: Sat 20 May 2017 - 9:00pm EDT [BBC America]
Running Time: 45 minutes

4.16 Million(i) (UK)

Appreciation Index: 82 (UK)

Audience Share: 22.7%(i) (UK)

In the Haereticum - the Vatican’s secret library of blasphemy - 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. The Vatican appeals to the Doctor. Will he read The Veritas? But can even the Doctor survive the ultimate truth?