This episode takes place on the Nerva Beacon in 16087.
There is a missing scene just after the half-transformed Noah appears from behind the rising door, Noah originally begged Vira to kill him to end his plight, but late in production this scene was cut as it was felt to be too dark and graphic, leaving a strange jump in the story where we see the Doctor glowering at a dropped gun with no explanation as to what occurred in between. The missing scene is unfortunately lost.
This episode was watched by 11.2 million viewers on its original transmission.
After the high minister's recording welcomes the space station back to earth, Harry jokes with Sarah Jane that since the high minister is a woman, it is a win for the fairer sex, as if it would take thousands of years before a woman would be in charge. Margaret Thatcher was elected the UK's first prime minister four years after this episode aired.