Written by Steven Moffat
"Something's coming, Missy, and I'm blind. How can I save them when I'm lost to the dark?"
| Episode Title | Premiere Date |
| Extremis | 20/05/2017 |
The Veritas. The truth. Truth so true you can't live with it. Is that looking into hell... or seeing the light?' Everyone who has ever read the Veritas has been found dead. In a forbidden library at the heart of the Vatican, the pope urges the Doctor to read the ancient text — but can he handle the truth?
| Character | Cast |
| The Doctor | Peter Capaldi |
| Bill | Pearl Mackie |
| Nardole | Matt Lucas |
| Missy | Michelle Gomez |
| Moira | Jennifer Hennessy |
| Cardinal Angelo | Corrado Invernizzi |
| The Pope | Joseph Long |
| Penny | Ronke Adekoluejo |
| Rafando | Ivanno Jeremiah |
| Piero | Francesco Martino |
| Pentagon Woman | Alana Maria |
| Nicholas | Laurent Mauriel |
| Monk | Jamie Hill |
| Voice of the Monks | Tim Bentinck |
| Role | Crew |
| Writer | Steven Moffat |
| Director | Daniel Nettheim |
| Producer | Peter Bennett |
| Executive Producer | Brian Minchin |
| Executive Producer | Steven Moffat |
