"Let's see.. is mass equals i times z, and E equals the square root of z times c squared, and the flux dispersal rate is inversely proportional to the fourth root of n.. carry the nine, then.."

—Doc reads out of his notebook.

Doc's notebook was a notebook in the possession of Emmett Brown. It documented thirty years of scientific breakthroughs in building a working time machine. Doc referred to it when the DeLorean time machine did not reappear one minute after temporal displacement. He noted that if it fell into the wrong hands, the effects could be catastrophic.

Marty McFly later found the book hidden inside the scaled down Hill Valley Courthouse on Doc's 1955 demonstration model, and had to outsmart Biff Tannen in order to obtain it.

Inside there were technical schematics, circuit diagrams, equations, and notes to himself, particularly for October 26, 1985, in which he had to wear a bulletproof vest, walk Einstein before the time experiment, check the time circuits for stickiness, and remind Marty to bring a camera.

AppearancesEdit

• Back to the Future: The Game
  • Back to the Future: The Game - Episode 1: It's About Time (First appearance)
  • Back to the Future: The Game - Episode 3: Citizen Brown