Timeline 51 was a timeline created when Dr. Emmett Brown, Jules BrownVerne Brown, and Donnie traveled from 1991 to October 10, 3000000 BC. 

Events []

Cretaceous Period[]

3000000s BC []

  • Tuesday, October 10Doc, Jules, Verne, and Donnie appear from 1991 and stop the previous Doc from destroying the meteor, thus causing the extinction of Donnie and the other dinosaurs. This negates the alternate timeline created by the previous Doc. They return to 1991. This creates Timeline 52, which begins at Doc, Jules, and Verne's entry point in 1991 and timeline 51 fades away.