Humour

Tamsin Drew was accused of having a lack of either intelligence or a sense of humour. (AUDIO: Nevermore)

Elizabeth Meadows, after conversion into a Cyberslave, dismissed humour as "a redundant application of intellect." The Eleventh Doctor disagreed, finding it often came in handy in a tight spot. (GAME: Blood of the Cybermen)

The Sontarans observed that humour could increase the efficiency of humans by up to 84% in stressful situations. Slite made a recommendation to Sontaran Command that they consider its useful applications. (AUDIO: The Sontarans)