4 (number)

4 was a number.

According to Jo Grant, three sevens times four were equal to 84. Also according to her, 12 divided by 4 was 3. (TV: The Claws of Axos)

Some species, like the Empathivores, (COMIC: The Whispering Gallery) the Moxolon Swamp Vipers, (TV: The Vault of Secrets) the Tractites (PROSE: Genocide) and the Tetraps (TV: Time and the Rani) had four eyes.

Vulpana had four moons. (AUDIO: The Moons of Vulpana)