MOD St Athan as Deserted Chamber
Porridge tells Clara about the war with the Cybermen.
Source: The Doctor Who Locations Guide
“Nightmare in Silver” Filming Locations
Doctor Who episode “Nightmare in Silver” was filmed in Newport & Cardiff in the United Kingdom.
Newbridge Memo as Guard Barracks
Angie wanders into the barracks and is followed by Clara and the Doctor.
Source: The Doctor Who Locations Guide
Castell Coch as Natty Longshoe's Castle
Clara leads the punishment platoon to a defensible position in the castle.
Source: The Doctor Who Locations Guide
Uskmouth Power Station as Underneath the Park
Clara and the guards hunt the Cybermen in the bowels of the amusement park.
Source: The Doctor Who Locations Guide
Caerphilly Castle as Natty Longshoe's Castle (hall)
The Doctor plays chess against himself for control of his brain.
Source: The Doctor Who Locations Guide
Cardiff City Hall as Emperor's Spaceship
The Emperor and the others are teleported to his spacecraft right before the planet is imploded.
Source: The Doctor Who Locations Guide