Rosemary Kizlet's tablet

From Tardis Wiki, the free Doctor Who reference
Kizlet's tablet, here showing the ability to control one's conscience, paranoia, obedience and IQ.

Kizlet's tablet was a tablet that Kizlet owned, to control people to do different things. It could change conscience, paranoia, obedience, and IQ. It also brought all the workers (including Kizlet herself) back to their "factory settings", releasing them from the control of the Great Intelligence. (TV: The Bells of Saint John)