“Safe as houses,” the Doctor assured her. “The TARDIS could balance on the head of a pin, if the pin was strong enough.”
They were parked on the apex of a sharply sloping roof. Around them, similar roofs stretched away as far as the eye could see, which was quite a long way thanks to the three bright moons in the sky.
“Come along.” The Doctor was already standing on the ridge tiles. Taking his hand, Clara followed.