The BBC have confirmed that episode five of Series 10, Oxygen, will air on Saturday 20th May at 7.25pm on BBC One.
The episode will last for 50 minutes, and finishes at 8.15pm. Extremis, written by Steven Moffat, will air on the same day on BBC America at 9/8C.
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?