Albert Einstein

Albert Einstein (14th March 1879 - 18th April 1955) was renowned as one of the most brilliant scientists of the 20th century. The Doctor claimed to have met Einstein. (DW: The Stones of Blood)

In the 1940s, the Rani kidnapped Einstein and brought him to Lakertya so that his genius could be used to help create her Time Brain. (DW: Time and the Rani)

The Eighth Doctor claimed that he knew Einstein. (TN: The Eye of the Tyger).

The Eleventh Doctor used Einstein as an example of great people who had Dyslexia in order to encourage Elliot Northover to continue trying. (DW: The Hungry Earth)

The Doctor once claimed to have had a party at Frank Sinatra's hunting lodge with Einstein and Father Christmas, producing a photograph of them as proof. (DW: A Christmas Carol)

Sherman thought that Einstein came close to the theory of time travel, but lost it with the "three rivers" theory. (ST: The Way Forwards)