Vicki explains to Steven that TARDIS stands for ‘Time and Relative Dimensions in Space’. This is the first time that ‘Dimension’ became ‘Dimensions’. The Doctor and Vicki are surprised ...

Paul Steinhardt. The key insight that enabled their explanation was that quasicrystals were, in fact, periodic—but in a higher dimension than the one in which they exist physically. Using this ...

For the scene in which the Doctor talks to the Chinese delegate in Hokkien, a translation is provided for the viewer in the form of subtitles. This is the first time that subtitles had been used ...