However, Doc and Marty dont have an easy time getting to this point.
Martys arrival triggers a clever subversion of what is known as the Grandfather Paradox.
Marty McFly’s First Change To The Timeline In Back To The Future Completely Flipped The Oldest Time Travel Paradox
Back to the Future's story flipped the most famous time travel paradox with George and Marty's first meeting, but its story impact was unchanged.
