These are the 1980s notebook scribbles that inspired the Back to the Future trilogy

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Jul 2, 2015, 4:29 PM EDT

The Back to the Future trilogy is one of the most beloved series in movie history, and here’s a peek at how it all came together.

HitFix has published two scans of hand-written notes written by Back to the Future writer-producer Bob Gale, where he maps out ideas that will eventually form Parts II and III of the iconic sci-fi franchise. As most fans know, the series was never conceived as a trilogy but, after the first film became a monster hit, the studio lured Gale and director Robert Zemeckis back to keep the train rolling. That iconic "To Be Continued" card? Added for the VHS release.

The notebook pages are dated April 1, 1986, and Gale said they are the oldest scribbles that exist in connection to the franchise. The notes aren’t even really plots, per se, but more random notes for potential scenes and world-building bits. Some made the cut, and many did not. But, it’s easy to see they already had the framework in place at this point — the Back to the Future II notes are about the future, while the Back to the Future III notes focus on potential Wild West scenarios.

Check out the page scans below and let us know what you think:

(Via HitFix)