Agent six hundred and sixty six hotline(or sometimes just hotline) is the codename used by a mysterious human male who during the time war was selected to work with the gallifreyan organisation,the celestial intervention agency or C.I.A for short.Upon joining the agency his name was wiped and he received a crude vortex manipulator as well as a piece of psychic paper.The time lords chose him as they needed someone who was not a time lord to go on certain missions,one day when the time lords put in charge of him disappeared (unknown to him they had been caught up in the time lock) he decided to continue travelling in order to fulfil the purpose of the agency;to intervene when the universe was in need.