Alias of Einstein
For a full biography, see the article on Einstein.
On September 21, 1939, at the New York World's Fair, Emmett Brown was informed that dogs were not allowed at the fair. Doc put Einstein, who he called "Fido", due to the fact that Albert Einstein was well known in that time period, into the Time Train.
In 1991, at the Institute of Future Technology there was a Doc Brown: The Inventive Years segment of a video that played at the institute. The narrator's voice-over for this segment began the canine cafeteria demonstration with the statement "Looks like it's supper time for Fido."
- Back to the Future: The Ride (During the "Doc Brown: The Inventive Years" segment of the pre-ride video)
- Back to the Future (IDW Publishing)