Richard Nixon Richard Milhous Nixon was the 37th President of the United States . The Eleventh Doctor was not particularly fond of him due to the unfortunate events that happened during his term as president , such as Vietnam and Watergate , but soon got over it . Nixon assisted the Doctor during his investigation of the Silence , often using his power as president to do so ; he freed the Doctor after he was arrested and calmed down soldiers at Area 51 by giving a speech . In 1969 , Nixon received calls directly to him , wherever he was , from a child telling him she was scared of the monsters that were everywhere and that an astronaut was coming to eat her . ( WC : " Prequel ( The Impossible Astronaut ) " ) Nixon asked the child where and who she was , mistaking the location she was giving , " Jefferson , Adams , Hamilton " , as her name and also mistaking her for a boy . However , she hung up befor he could learn more . Unsure of how or why the child was calling him , and suspecting FBI involvement , Nixon had Canton Everett Delaware III brought in . Having been recently fired from the FBI , he was the second best choice for Nixon ' s task ; he had the training needed , but wasn ' t with the Bureau . At the White House , Nixon played Canton a recording of one of the calls . He found the Doctor writing down their conversation in his office and called security . They promptly overwhelmed the Doctor until River unveiled his invisible TARDIS and the Doctor came up with the alibi that he was on loan from Scotland Yard , sent to also help him with the case . Nixon allowed the Doctor to help , along with his companions , giving him whatever he needed to find the mysterious caller . The Doctor worked out the caller ' s location from the names Nixon thought belonged to the caller . When Nixon received another call , he informed the caller that he had sent his best people to help : the Doctor , River Song , Amy Pond , Rory Williams , and Canton . He did so as he watched the TARDIS dematerialise from sight , shocking him . ( TV : " The Impossible Astronaut " ) Three months later Nixon came to the Doctor ' s rescue when he was detained by NASA security after implanting an extra device of his own into the on - board computer for Apollo 11 . After travelling in the TARDIS to Area 51 , he calmed the security team after Canton had spent days " inside " the prison . In the White House after the Silence threat had been eliminated , he asked the Doctor about his future . The Doctor said that he would always be remembered , and told him to say " hi " to David Frost for him . At the Doctor ' s urging , Nixon tried to be lenient and allow Canton to get married , believing he wished to marry a black woman . When Canton revealed he wished to marry a black " man " , Nixon was taken aback . Regaining his composure , he told Canton that " I believe the moon is far enough for now . " ( TV : " Day of the Moon " ) Nixon ' s recording , referred to as the " Nixon Tapes " , were left for future presidents to know of the Doctor . ( COMIC : " Air Force Gone " ) In 1974 , he authorised the " omega solution " , the complete nuclear obliteration of Great Britain , in order to stop the invasion of the Remoraxian s . The attack was called off by the CIA when the Remoraxians left . ( COMIC : " In With the Tide " ) References . The Third Doctor and Liz Shaw passed by Nixon ' s wax replica whilst visiting Madame Tussauds to investigate the first Auton invasion of Earth . ( TV : " Spearhead from Space " ) In San Francisco on New Year ' s Eve 1999 , Walker General Hospital morgue attendant Pete wore a caricature mask of Nixon to a fancy dress party . Early that morning , the mask had been among the costume items discovered in the hospital ' s lockers and discarded by the newly - regenerated Eighth Doctor during his search for clothes . ( TV : " Doctor Who " )