DOCTOR WHO: EXTREMIS

BBC One, Saturday, 7.25pm

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?

Michelle Gomez guest stars as Missy.