Bttf marty doc remote.jpg

"Only if it turns out that reality is actually nothing more than a holographic illusion created by the interplay of subatomic particles on a vast two-dimensional membrane."

This article covers a subject that has been deemed non-canon by either the author or the Back to the Future licensees, and thus should not be taken as a part of the "real" Back to the Future universe.

Timeline 20 was a timeline created when Emmett and Verne Brown arrived in 1893 from 2017.




  • Year unknown (after 1986)
    • Date unknown
      • Doc arrives at his secret lab and discovers a letter that Marty had written on April 15, 1986. Doc then departs for that date.[2] This creates Timeline 21, which begins at Doc's entry point in 1986 and timeline 20 fades away.



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