6 was a number.
The sixth eye of a Dogon allowed a person to look back at their life and make better choices, especially if swallowed. (TV: Random Shoes)
Some beings also had six legs, such as Cractids, (AUDIO: Cobwebs) the Greld, (PROSE: The Empire of Glass) Mantasphids, (TV: The Infinite Quest) the Ruin, (PROSE: Dominion) and Spidrons. (COMIC: Nova)
Species which had six fingers included the Panjistri, (PROSE: Timewyrm: Apocalypse) Kusk, (PROSE: Longest Day) I, (PROSE: Seeing I) and Grold. (PROSE: The Eye of the Giant)
The Eyeless had six digits on their hands and feet. (PROSE: The Eyeless)
Drashigs had six eyes. (TV: Carnival of Monsters)
The countdown towards the Ninth Doctor's eviction on Big Brother counted from 6 to 0, going through 5, 4, 3, 2, and 1. (TV: Bad Wolf)
The Fourth Doctor found anything with six parts to be boring, particularly the Key to Time. (PROSE: The Pirate Planet)
The Eighth Doctor was imprisoned by the Consensus for six years. (AUDIO: Prisoner of the Sun)
Zheng Yi Sao's second son was 6 in 1807. (TV: Legend of the Sea Devils)
Six months after Aaron Smith met the Ninth Doctor in a department store in mid-2004, he wrote about his encounter on whoisdoctorwho.co.uk. (PROSE: Have You Seen This Man?)
Jordan Proctor picked up the numbers of six girls on one drunken night out. (AUDIO: SOS)