The Licensor

The Licensor was "the second-most evil creature in the universe".

The head of the Licensed Reality Corporation, he enlisted Autons and Sontarans (as well as Cyberons) in his maniacal desire to stamp out anything unlicensed from the face of the universe. His efforts caused a disturbance in the balance of accepted canonicity, which disturbed Rassilon. Rassilon put the Foot Doctor on the case, and the Chrono-Baron, with the help of his new companion the Salesman, tricked the Licensor into landing on Unlicensed Earth. As by the Licensor's own rules nothing on Unlicensed Earth existed, this destroyed him. (NOTVALID: Do You Have a Licence to Save this Planet?)

Behind the scenes

 * Much as the Foot Doctor is a transparent knockoff of the Doctor, so too is the Licensor a parody of the Master, especially in his Roger Delgado and Anthony Ainley incarnations. This is somewhat ironic, as this means the Licensor is himself one of the unlicensed parodies which he so ruthlessly antagonises in-universe.