Great Catastrophe (Sleep No More)
From Tardis Wiki, the free Doctor Who reference
The Great Catastrophe was an event that occurred prior to the Twelfth Doctor's visit to the Le Verrier station of the 38th century. It caused a tectonic realignment which resulted in India and Japan becoming merged and a new Indo-Japanese culture. (TV: Sleep No More)
Behind the scenes
After the airing of Sleep No More, writer Mark Gatiss confirmed that "The Great Catastrophe" was a reference to Frontios where the Earth had collided with the Sun.[1]
